diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5895ef4..2534a56 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -60,7 +60,7 @@ jobs:
         run: cat _build/meson-logs/testlog.txt
 
   sanitizer:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-20.04
     steps:
       - name: install-deps
         run: |
@@ -69,7 +69,6 @@ jobs:
             gstreamer1.0-plugins-bad \
             gstreamer1.0-plugins-good \
             gstreamer1.0-tools \
-            libgirepository1.0-dev \
             libgstreamer1.0-dev \
             libgtk-3-dev \
             libxml2-utils \
@@ -78,7 +77,7 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: configure
-        run: meson _build -Db_sanitize=address,undefined
+        run: meson _build -Db_sanitize=address,undefined -Dintrospection=false
 
       - name: build
         run: ASAN_OPTIONS=start_deactivated=true,detect_leaks=0 ninja -C _build