diff --git a/tools/github/diploma-thesis-docker.yml b/tools/github/diploma-thesis-docker.yml
index 1a3f5bf..d22ab09 100644
--- a/tools/github/diploma-thesis-docker.yml
+++ b/tools/github/diploma-thesis-docker.yml
@@ -16,9 +16,31 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
-      - name: Build diploma thesis
+      - name: Cache Docker image
+        id: cache-docker
+        uses: actions/cache@v4
+        with:
+          path: /tmp/.docker
+          key: ${{ runner.os }}-docker-${{ hashFiles('**/HTLLE-DA-Vorlage/tools/docker/Dockerfile') }}
+          restore-keys: | 
+            ${{ runner.os }}-docker-
+
+      - name: Create Docker cache directory
+        if: steps.cache-docker.outputs.cache-hit != 'true'
+        run: mkdir -p /tmp/.docker
+
+      - name: Load cached Docker image
+        if: steps.cache-docker.outputs.cache-hit == 'true'
+        run: docker load -i /tmp/.docker/image.tar
+
+      - name: Pull Docker image
+        if: steps.cache-docker.outputs.cache-hit != 'true'
         run: |
-          docker run --rm -v ${{ github.workspace }}/Diplomarbeit:/workspace bytebang/htlle-da-env
+          docker pull bytebang/htlle-da-env
+          docker save bytebang/htlle-da-env -o /tmp/.docker/image.tar
+
+      - name: Build diploma thesis
+        run: docker run -v ${{ github.workspace }}/Diplomarbeit:/workspace bytebang/htlle-da-env
 
       - name: Send diploma thesis
         uses: dawidd6/action-send-mail@v4