diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 72769da..0b19ef8 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1041,16 +1041,31 @@ jobs:
       - uses: actions/checkout@v2
         with:
           submodules: recursive
+      - name: Set up cache
+        id: cache
+        uses: actions/cache@v2
+        with:
+          path: |
+            src/Rack/dep/bin
+            src/Rack/dep/include
+            src/Rack/dep/lib
+            src/Rack/dep/share
+            src/Rack/dep/jansson-2.12
+            src/Rack/dep/libarchive-3.4.3
+            src/Rack/dep/libsamplerate-0.1.9
+            src/Rack/dep/speexdsp-SpeexDSP-1.2rc3
+            src/Rack/dep/zstd-1.4.5
+          key: pluginval-v${{ env.CACHE_VERSION }}
       - name: Set up dependencies
         run: |
           # custom repos
-          wget https://launchpad.net/~kxstudio-debian/+archive/kxstudio/+files/kxstudio-repos_10.0.3_all.deb
-          sudo dpkg -i kxstudio-repos_10.0.3_all.deb
+          wget https://launchpad.net/~kxstudio-debian/+archive/kxstudio/+files/kxstudio-repos_11.1.0_all.deb
+          sudo dpkg -i kxstudio-repos_11.1.0_all.deb
           sudo apt-get update -qq
           # build-deps
           sudo apt-get install -yqq libdbus-1-dev libgl1-mesa-dev liblo-dev libx11-dev libxcursor-dev libxext-dev libxrandr-dev
           # runtime testing
-          sudo apt-get install -yqq carla-git lilv-utils lv2-dev lv2lint valgrind xvfb
+          sudo apt-get install -yqq carla-git lilv-utils lv2-dev lv2lint kxstudio-lv2-extensions mod-lv2-extensions valgrind xvfb
       - name: Set up ccache
         uses: hendrikmuhs/ccache-action@v1.2
         with:
@@ -1095,7 +1110,7 @@ jobs:
             export LV2_PATH=/tmp/lv2-path
             for p in $(lv2ls); do \
                 env CARLA_BRIDGE_DUMMY=1 CARLA_BRIDGE_TESTING=native \
-                    valgrind \
+                    xvfb-run valgrind \
                     --error-exitcode=255 \
                     --leak-check=no \
                     --track-origins=yes \
@@ -1106,7 +1121,7 @@ jobs:
         run: |
             for p in $(ls bin/*.vst/*.so); do \
                 env CARLA_BRIDGE_DUMMY=1 CARLA_BRIDGE_TESTING=native \
-                    valgrind \
+                    xvfb-run valgrind \
                     --error-exitcode=255 \
                     --leak-check=no \
                     --track-origins=yes \
@@ -1117,7 +1132,7 @@ jobs:
         run: |
             for p in $(ls bin/ | grep vst3); do \
                 env CARLA_BRIDGE_DUMMY=1 CARLA_BRIDGE_TESTING=native \
-                    valgrind \
+                    xvfb-run valgrind \
                     --error-exitcode=255 \
                     --leak-check=no \
                     --track-origins=yes \
diff --git a/dpf b/dpf
index 7b8eefb..6cf523a 160000
--- a/dpf
+++ b/dpf
@@ -1 +1 @@
-Subproject commit 7b8eefb59f62dd51e08cdda5c33478781eccb072
+Subproject commit 6cf523adada34df242dc1bf4b33bfb025284c631