diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index 7615cee..081292e 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -2,7 +2,7 @@
 
 # [Choice] Debian / Ubuntu version (use Debian 11, Ubuntu 18.04/22.04 on local arm64/Apple Silicon): debian-11, debian-10, ubuntu-22.04, ubuntu-20.04, ubuntu-18.04
 ARG IMAGE="ubuntu-22.04"
-ARG LLVM_VERSION="18"
+ARG LLVM_VERSION="19"
 
 FROM mcr.microsoft.com/vscode/devcontainers/cpp:${IMAGE}
 ARG LLVM_VERSION
diff --git a/.devcontainer/install-llvm.sh b/.devcontainer/install-llvm.sh
index 48e3e1b..7955685 100644
--- a/.devcontainer/install-llvm.sh
+++ b/.devcontainer/install-llvm.sh
@@ -11,7 +11,7 @@ usage() {
     exit 1;
 }
 
-CURRENT_LLVM_STABLE=18
+CURRENT_LLVM_STABLE=19
 BASE_URL="http://apt.llvm.org"
 
 # Check for required tools
@@ -118,6 +118,7 @@ LLVM_VERSION_PATTERNS[15]="-15"
 LLVM_VERSION_PATTERNS[16]="-16"
 LLVM_VERSION_PATTERNS[17]="-17"
 LLVM_VERSION_PATTERNS[18]="-18"
+LLVM_VERSION_PATTERNS[19]="-19"
 
 if [ ! ${LLVM_VERSION_PATTERNS[$LLVM_VERSION]+_} ]; then
     echo "This script does not support LLVM version $LLVM_VERSION"
@@ -169,4 +170,4 @@ apt-get install -f -y $PKG
 update-alternatives --install /usr/bin/c++ c++ /usr/bin/clang++-$LLVM_VERSION 60
 update-alternatives --install /usr/bin/cc cc /usr/bin/clang-$LLVM_VERSION 60
 
-ln -s /usr/bin/FileCheck-$LLVM_VERSION /usr/bin/FileCheck
+ln -s /usr/bin/FileCheck-$LLVM_VERSION /usr/bin/FileCheck
\ No newline at end of file
diff --git a/.devcontainer/install-vast.sh b/.devcontainer/install-vast.sh
index d7cefc5..b65955d 100644
--- a/.devcontainer/install-vast.sh
+++ b/.devcontainer/install-vast.sh
@@ -31,19 +31,18 @@ install_gap() {
     git clone --recursive "$GAP_REPO" "$GAP_BUILD"
     cd "$GAP_BUILD"
     mkdir -p build && cd build
-    cmake -G Ninja .. -DGAP_ENABLE_MLIR=ON -DCMAKE_INSTALL_PREFIX="$INSTALL_DIR" -DMLIR_DIR="/usr/lib/llvm-18/lib/cmake/mlir"
+    cmake -G Ninja .. -DGAP_ENABLE_MLIR=ON -DCMAKE_INSTALL_PREFIX="$INSTALL_DIR" -DMLIR_DIR="/usr/lib/llvm-19/lib/cmake/mlir"
     ninja && sudo ninja install
 }
 
 build_vast() {    
     echo "Cloning VAST repository..."
-    git clone --branch v0.0.33 --recursive "$VAST_REPO" "$BUILD_DIR"
+    git clone --branch  v0.0.66 --recursive "$VAST_REPO" "$BUILD_DIR"
 
     echo "Installing VAST..."
     cd "$BUILD_DIR" && mkdir -p build && cd build
-    cmake -G Ninja .. -DCMAKE_INSTALL_PREFIX="$INSTALL_DIR" -DCMAKE_LINKER_TYPE=LLD -DMLIR_DIR="/usr/lib/llvm-18/lib/cmake/mlir"
+    cmake -G Ninja .. -DCMAKE_INSTALL_PREFIX="$INSTALL_DIR" -DCMAKE_LINKER_TYPE=LLD -DMLIR_DIR="/usr/lib/llvm-19/lib/cmake/mlir"
     cmake --build . && sudo cmake --install .
-    cat CMakeCache.txt
 }
 
 clean_up() {
@@ -56,4 +55,4 @@ install_gap
 build_vast
 clean_up
 
-echo "VAST has been successfully installed!"
\ No newline at end of file
+echo "VAST has been successfully installed!"
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 48d6a87..bc19028 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -23,7 +23,7 @@ jobs:
   build:
     strategy:
       matrix:
-        llvm-version: [18]
+        llvm-version: [19]
         image-version: [22.04]
         build-type: [Release, Debug]
         sanitizers: [ON, OFF]
diff --git a/.github/workflows/devcontainer.yml b/.github/workflows/devcontainer.yml
index 018090d..6bcb22f 100644
--- a/.github/workflows/devcontainer.yml
+++ b/.github/workflows/devcontainer.yml
@@ -13,7 +13,7 @@ jobs:
   build:
     strategy:
       matrix:
-        llvm-version: [18]
+        llvm-version: [19]
         image-version: [22.04]
     runs-on: ubuntu-22.04
     timeout-minutes: 45
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 395d093..1d468b1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -79,7 +79,7 @@ FindAndSelectClangCompiler()
 #
 # LLVM & MLIR & Clang
 #
-find_package(LLVM 18.1 REQUIRED CONFIG)
+find_package(LLVM 19.1 REQUIRED CONFIG)
 message(STATUS "Found LLVM ${LLVM_PACKAGE_VERSION}")
 message(STATUS "Using LLVMConfig.cmake in: ${LLVM_DIR}")
 list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_DIR}")
diff --git a/lib/patchestry/AST/TypeBuilder.cpp b/lib/patchestry/AST/TypeBuilder.cpp
index 30b9cf2..b723770 100644
--- a/lib/patchestry/AST/TypeBuilder.cpp
+++ b/lib/patchestry/AST/TypeBuilder.cpp
@@ -41,7 +41,7 @@ namespace patchestry::ast {
         // Traverse through missing type definition for a composite type and create the complete
         // definition for them
         for (auto &[key, decl] : missing_type_definition) {
-            if (const auto *record_decl = llvm::dyn_cast< clang::RecordDecl >(decl)) {
+            if (llvm::isa< clang::RecordDecl >(decl)) {
                 auto iter = lifted_types.find(key);
                 // if type key does not exist in the lifted types, it could be a bug in create
                 // types.