diff --git a/.clusterfuzzlite/Dockerfile b/.clusterfuzzlite/Dockerfile
index 1061003e..ecda1f66 100644
--- a/.clusterfuzzlite/Dockerfile
+++ b/.clusterfuzzlite/Dockerfile
@@ -8,7 +8,8 @@ FROM gcr.io/oss-fuzz-base/base-builder:v1
 
 RUN apt-get update && apt-get install -y \
 	build-essential ninja-build cmake make \
-	libreadline-dev libunwind-dev zlib1g-dev
+	libreadline-dev libunwind-dev zlib1g-dev \
+	protobuf-compiler libprotobuf-dev
 
 COPY . $SRC/lua-c-api-tests
 WORKDIR $SRC/lua-c-api-tests
diff --git a/.clusterfuzzlite/build.sh b/.clusterfuzzlite/build.sh
index a9e930bb..8be75585 100755
--- a/.clusterfuzzlite/build.sh
+++ b/.clusterfuzzlite/build.sh
@@ -29,6 +29,7 @@ esac
 cmake_args=(
     -DUSE_LUAJIT=ON
     -DOSS_FUZZ=ON
+    -DENABLE_BUILD_PROTOBUF=OFF
     $SANITIZERS_ARGS
 
     # C compiler
diff --git a/.github/workflows/cflite_batch.yml b/.github/workflows/cflite_batch.yml
index 5605787b..25193fd7 100644
--- a/.github/workflows/cflite_batch.yml
+++ b/.github/workflows/cflite_batch.yml
@@ -15,7 +15,7 @@ permissions: read-all
 
 jobs:
   luajit:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     strategy:
       fail-fast: false
       matrix:
diff --git a/.github/workflows/cflite_build.yml b/.github/workflows/cflite_build.yml
index 89a639d8..743f2559 100644
--- a/.github/workflows/cflite_build.yml
+++ b/.github/workflows/cflite_build.yml
@@ -10,7 +10,7 @@ permissions: read-all
 
 jobs:
   luajit:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     strategy:
       fail-fast: false
       matrix:
diff --git a/.github/workflows/cflite_cron.yml b/.github/workflows/cflite_cron.yml
index 3f3f2447..27778560 100644
--- a/.github/workflows/cflite_cron.yml
+++ b/.github/workflows/cflite_cron.yml
@@ -16,7 +16,7 @@ jobs:
 # are covered by fuzzing.
 
   Coverage:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/setup
@@ -46,7 +46,7 @@ jobs:
 # code coverage.
 
   Pruning:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/setup
diff --git a/.github/workflows/cflite_pr.yml b/.github/workflows/cflite_pr.yml
index f9ca30d1..a46d0d76 100644
--- a/.github/workflows/cflite_pr.yml
+++ b/.github/workflows/cflite_pr.yml
@@ -35,7 +35,7 @@ permissions: read-all
 
 jobs:
   luajit:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     strategy:
       fail-fast: false
       matrix:
diff --git a/CMakePresets.json b/CMakePresets.json
index b7722910..04b87368 100644
--- a/CMakePresets.json
+++ b/CMakePresets.json
@@ -41,7 +41,7 @@
         },
         "ENABLE_BUILD_PROTOBUF": {
           "type": "BOOL",
-          "value": "FALSE"
+          "value": "TRUE"
         }
       }
     },
diff --git a/cmake/ProtobufMutator.cmake b/cmake/ProtobufMutator.cmake
index da63e27f..2160ff47 100644
--- a/cmake/ProtobufMutator.cmake
+++ b/cmake/ProtobufMutator.cmake
@@ -29,7 +29,7 @@ include (ExternalProject)
 ExternalProject_Add(${LPM_TARGET}
   PREFIX ${LPM_TARGET}
   GIT_REPOSITORY ${LPM_REPO}
-  GIT_TAG 212a7be
+  GIT_TAG v1.3
   UPDATE_COMMAND ""
   CONFIGURE_COMMAND ${CMAKE_COMMAND} ${LPM_INSTALL_DIR}/src/${LPM_TARGET}
         -G${CMAKE_GENERATOR}