diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 77ae4dcdf..ce97d524e 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -59,6 +59,12 @@ jobs:
           name: vscode-codeql-extension
           path: artifacts
 
+      - name: Upload source maps
+        uses: actions/upload-artifact@v3
+        with:
+          name: vscode-codeql-sourcemaps
+          path: dist/vscode-codeql/out/*.map
+
         # TODO Run tests, or check that a test run on the same branch succeeded.
 
       - name: Create release
diff --git a/extensions/ql-vscode/gulpfile.ts/webpack.config.ts b/extensions/ql-vscode/gulpfile.ts/webpack.config.ts
index 49988811d..c15b01f04 100644
--- a/extensions/ql-vscode/gulpfile.ts/webpack.config.ts
+++ b/extensions/ql-vscode/gulpfile.ts/webpack.config.ts
@@ -54,6 +54,9 @@ export const config: webpack.Configuration = {
           MiniCssExtractPlugin.loader,
           {
             loader: "css-loader",
+            options: {
+              sourceMap: true,
+            },
           },
         ],
       },