diff --git a/.github/actions/prepare/action.yml b/.github/actions/prepare/action.yml
index 830caf5e..5fd44ae5 100644
--- a/.github/actions/prepare/action.yml
+++ b/.github/actions/prepare/action.yml
@@ -24,7 +24,7 @@ runs:
         ubuntu-version: 22.04
     - uses: awalsh128/cache-apt-pkgs-action@latest
       with:
-        packages: libsecp256k1-dev libsodium-dev
+        packages: libsecp256k1-dev libsodium-dev liblz4-dev
 #    - shell: bash
 #      run: |
 #        sudo apt install --yes libc++abi-${{ steps.llvm_setup.outputs.LLVM_VERSION }}-dev libc++-${{ steps.llvm_setup.outputs.LLVM_VERSION }}-dev
diff --git a/.github/workflows/pr-check.yml b/.github/workflows/pr-check.yml
index 7da9de35..a14354cf 100644
--- a/.github/workflows/pr-check.yml
+++ b/.github/workflows/pr-check.yml
@@ -29,7 +29,7 @@ jobs:
           submodules: recursive
       - uses: awalsh128/cache-apt-pkgs-action@latest
         with:
-          packages: libsecp256k1-dev libsodium-dev
+          packages: libsecp256k1-dev libsodium-dev liblz4-dev
       - uses: arduino/setup-protoc@v3
       - uses: dtolnay/rust-toolchain@stable
         with:
diff --git a/tonlibjson-sys/ton-testnet b/tonlibjson-sys/ton-testnet
index 0feaaf59..cc4244f5 160000
--- a/tonlibjson-sys/ton-testnet
+++ b/tonlibjson-sys/ton-testnet
@@ -1 +1 @@
-Subproject commit 0feaaf591c1332a2b4cacfd3dd8f8253afa94de8
+Subproject commit cc4244f5a4893aaeb652c8c69c5ed95336fbf7a3