diff --git a/.github/workflows/build_and_deploy.yaml b/.github/workflows/build_and_deploy.yaml
index b91f644..e7cef75 100644
--- a/.github/workflows/build_and_deploy.yaml
+++ b/.github/workflows/build_and_deploy.yaml
@@ -107,7 +107,7 @@ jobs:
         environment: ${{ needs.prepare.outputs.deploy == 'true' && 'packages.element.io' || '' }}
         steps:
             - name: Download artifacts
-              uses: actions/download-artifact@v4
+              uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4
 
             - name: Prepare artifacts for deployment
               run: |
@@ -197,7 +197,7 @@ jobs:
 
             - name: Stash packages.element.io
               if: needs.prepare.outputs.deploy == 'false'
-              uses: actions/upload-artifact@v4
+              uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
               with:
                   name: packages.element.io
                   path: packages.element.io
@@ -235,7 +235,7 @@ jobs:
 
             - name: Stash debs
               if: needs.prepare.outputs.deploy == 'false' && needs.linux.result == 'success'
-              uses: actions/upload-artifact@v4
+              uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
               with:
                   name: debs
                   path: |
@@ -274,14 +274,14 @@ jobs:
             id-token: write # This is required for requesting the JWT
         steps:
             - name: Configure AWS credentials
-              uses: aws-actions/configure-aws-credentials@v4
+              uses: aws-actions/configure-aws-credentials@e3dd6a429d7300a6a4c196c26e071d42e0343502 # v4
               with:
                   role-to-assume: arn:aws:iam::264135176173:role/Push-ElementDesktop-MSI
                   role-session-name: githubaction-run-${{ github.run_id }}
                   aws-region: ${{ env.AWS_REGION }}
 
             - name: Download artifacts
-              uses: actions/download-artifact@v4
+              uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4
               with:
                   pattern: win-*
 
diff --git a/.github/workflows/build_and_test.yaml b/.github/workflows/build_and_test.yaml
index a78b2ad..2fd9971 100644
--- a/.github/workflows/build_and_test.yaml
+++ b/.github/workflows/build_and_test.yaml
@@ -52,9 +52,9 @@ jobs:
         runs-on: ubuntu-24.04
         if: always()
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
-            - uses: actions/setup-node@v4
+            - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
               with:
                   cache: "yarn"
                   node-version: "lts/*"
@@ -63,7 +63,7 @@ jobs:
               run: yarn install --frozen-lockfile
 
             - name: Download blob reports from GitHub Actions Artifacts
-              uses: actions/download-artifact@v4
+              uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4
               with:
                   pattern: blob-report-*
                   path: all-blob-reports
@@ -74,7 +74,7 @@ jobs:
 
             - name: Upload HTML report
               if: always()
-              uses: actions/upload-artifact@v4
+              uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
               with:
                   name: html-report
                   path: playwright-report
diff --git a/.github/workflows/build_linux.yaml b/.github/workflows/build_linux.yaml
index d56f6a8..0a3cad1 100644
--- a/.github/workflows/build_linux.yaml
+++ b/.github/workflows/build_linux.yaml
@@ -60,21 +60,21 @@ jobs:
                         }
                       }
 
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
-            - uses: actions/download-artifact@v4
+            - uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4
               with:
                   name: webapp
 
             - name: Cache .hak
               id: cache
-              uses: actions/cache@v4
+              uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4
               with:
                   key: ${{ runner.os }}-${{ github.ref_name }}-${{ inputs.sqlcipher }}-${{ inputs.arch }}-${{ hashFiles('hakHash', 'electronVersion', 'dockerbuild/*') }}
                   path: |
                       ./.hak
 
-            - uses: actions/setup-node@v4
+            - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
               with:
                   node-version-file: .node-version
                   cache: "yarn"
@@ -173,7 +173,7 @@ jobs:
 
             # We exclude *-unpacked as it loses permissions and the tarball contains it with correct permissions
             - name: Upload Artifacts
-              uses: actions/upload-artifact@v4
+              uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
               with:
                   name: linux-${{ inputs.arch }}-sqlcipher-${{ inputs.sqlcipher }}
                   path: |
diff --git a/.github/workflows/build_macos.yaml b/.github/workflows/build_macos.yaml
index 1ea5d4c..325a98d 100644
--- a/.github/workflows/build_macos.yaml
+++ b/.github/workflows/build_macos.yaml
@@ -37,15 +37,15 @@ jobs:
         runs-on: macos-14 # M1
         environment: ${{ inputs.sign && 'packages.element.io' || '' }}
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
-            - uses: actions/download-artifact@v4
+            - uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4
               with:
                   name: webapp
 
             - name: Cache .hak
               id: cache
-              uses: actions/cache@v4
+              uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4
               with:
                   key: ${{ runner.os }}-${{ hashFiles('hakHash', 'electronVersion') }}
                   path: |
@@ -60,11 +60,11 @@ jobs:
                   rustup target add x86_64-apple-darwin
 
             # M1 macos-14 comes without Python preinstalled
-            - uses: actions/setup-python@v5
+            - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5
               with:
                   python-version: "3.13"
 
-            - uses: actions/setup-node@v4
+            - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
               with:
                   node-version-file: .node-version
                   cache: "yarn"
@@ -137,7 +137,7 @@ jobs:
 
             # We exclude mac-universal as the unpacked app takes forever to upload and zip and dmg already contains it
             - name: Upload Artifacts
-              uses: actions/upload-artifact@v4
+              uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
               with:
                   name: macos
                   path: |
diff --git a/.github/workflows/build_prepare.yaml b/.github/workflows/build_prepare.yaml
index 7e4011f..64253f5 100644
--- a/.github/workflows/build_prepare.yaml
+++ b/.github/workflows/build_prepare.yaml
@@ -49,9 +49,9 @@ jobs:
         outputs:
             nightly-version: ${{ steps.versions.outputs.nightly }}
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
-            - uses: actions/setup-node@v4
+            - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
               with:
                   node-version-file: .node-version
                   cache: "yarn"
@@ -137,7 +137,7 @@ jobs:
                   echo "| Element Web | [$WEB_VERSION](https://github.com/element-hq/element-web/commit/$WEB_VERSION) |" >> $GITHUB_STEP_SUMMARY
                   echo "| JS SDK      | [$JS_VERSION](https://github.com/matrix-org/matrix-js-sdk/commit/$JS_VERSION) |" >> $GITHUB_STEP_SUMMARY
 
-            - uses: actions/upload-artifact@v4
+            - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
               with:
                   name: webapp
                   retention-days: 1
diff --git a/.github/workflows/build_test.yaml b/.github/workflows/build_test.yaml
index b19e9cd..ab00dd2 100644
--- a/.github/workflows/build_test.yaml
+++ b/.github/workflows/build_test.yaml
@@ -27,9 +27,9 @@ jobs:
     test:
         runs-on: ${{ inputs.runs-on }}
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
-            - uses: actions/setup-node@v4
+            - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
               with:
                   node-version-file: .node-version
                   cache: "yarn"
@@ -37,7 +37,7 @@ jobs:
             - name: Install Deps
               run: "yarn install --frozen-lockfile"
 
-            - uses: actions/download-artifact@v4
+            - uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4
               with:
                   name: ${{ inputs.artifact }}
                   path: dist
@@ -75,7 +75,7 @@ jobs:
 
             - name: Upload blob report
               if: always() && inputs.blob_report
-              uses: actions/upload-artifact@v4
+              uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
               with:
                   name: blob-report-${{ inputs.artifact }}
                   path: blob-report
@@ -83,7 +83,7 @@ jobs:
 
             - name: Upload HTML report
               if: always() && inputs.blob_report == false
-              uses: actions/upload-artifact@v4
+              uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
               with:
                   name: ${{ inputs.artifact }}-test
                   path: playwright-report
diff --git a/.github/workflows/build_windows.yaml b/.github/workflows/build_windows.yaml
index 35a6b11..44a28c3 100644
--- a/.github/workflows/build_windows.yaml
+++ b/.github/workflows/build_windows.yaml
@@ -65,15 +65,15 @@ jobs:
                         }
                       }
 
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
-            - uses: actions/download-artifact@v4
+            - uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4
               with:
                   name: webapp
 
             - name: Cache .hak
               id: cache
-              uses: actions/cache@v4
+              uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4
               with:
                   key: ${{ runner.os }}-${{ inputs.arch }}-${{ hashFiles('hakHash', 'electronVersion') }}
                   path: |
@@ -102,7 +102,7 @@ jobs:
                   rustup default stable
                   rustup target add ${{ steps.config.outputs.target }}
 
-            - uses: actions/setup-node@v4
+            - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
               with:
                   node-version-file: .node-version
                   cache: "yarn"
@@ -206,7 +206,7 @@ jobs:
                   | ForEach-Object -Process {. $env:SIGNTOOL_PATH verify /pa $_.FullName; if(!$?) { throw }}
 
             - name: Upload Artifacts
-              uses: actions/upload-artifact@v4
+              uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
               with:
                   name: win-${{ inputs.arch }}
                   path: |
diff --git a/.github/workflows/dockerbuild.yaml b/.github/workflows/dockerbuild.yaml
index d4e37c3..f0d98f5 100644
--- a/.github/workflows/dockerbuild.yaml
+++ b/.github/workflows/dockerbuild.yaml
@@ -19,7 +19,7 @@ jobs:
             contents: read
             packages: write
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
             - name: Set up QEMU
               uses: docker/setup-qemu-action@29109295f81e9208d7d86ff1c6c12d2833863392 # v3
diff --git a/.github/workflows/static_analysis.yaml b/.github/workflows/static_analysis.yaml
index 5812b9b..146cf8b 100644
--- a/.github/workflows/static_analysis.yaml
+++ b/.github/workflows/static_analysis.yaml
@@ -9,9 +9,9 @@ jobs:
         name: "Typescript Syntax Check"
         runs-on: ubuntu-24.04
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
-            - uses: actions/setup-node@v4
+            - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
               with:
                   node-version-file: package.json
                   cache: "yarn"
@@ -35,9 +35,9 @@ jobs:
         name: "ESLint"
         runs-on: ubuntu-24.04
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
-            - uses: actions/setup-node@v4
+            - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
               with:
                   node-version-file: package.json
                   cache: "yarn"
@@ -53,9 +53,9 @@ jobs:
         name: "Workflow Lint"
         runs-on: ubuntu-24.04
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
-            - uses: actions/setup-node@v4
+            - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
               with:
                   node-version-file: package.json
                   cache: "yarn"
@@ -71,9 +71,9 @@ jobs:
         name: "Analyse Dead Code"
         runs-on: ubuntu-24.04
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
-            - uses: actions/setup-node@v4
+            - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
               with:
                   node-version-file: package.json
                   cache: "yarn"
diff --git a/.github/workflows/triage-stale.yml b/.github/workflows/triage-stale.yml
index 5921d92..46aa4ae 100644
--- a/.github/workflows/triage-stale.yml
+++ b/.github/workflows/triage-stale.yml
@@ -12,7 +12,7 @@ jobs:
             issues: write
             pull-requests: write
         steps:
-            - uses: actions/stale@v9
+            - uses: actions/stale@5bef64f19d7facfb25b37b414482c7164d639639 # v9
               with:
                   operations-per-run: 250
                   days-before-issue-stale: -1
diff --git a/dockerbuild/Dockerfile b/dockerbuild/Dockerfile
index ecd61fc..00d2e3c 100644
--- a/dockerbuild/Dockerfile
+++ b/dockerbuild/Dockerfile
@@ -1,6 +1,6 @@
 # Docker image to facilitate building Element Desktop's native bits using a glibc version (2.31)
 # with broader compatibility, down to Debian bullseye & Ubuntu focal.
-FROM rust:bullseye
+FROM rust:bullseye@sha256:f40b8cc3195deda321031e8dfe23c7d2586e3db7c4103fa36946982d9fd6d588
 
 ENV DEBIAN_FRONTEND=noninteractive