diff --git a/build_clang.sh b/build_clang.sh
index 1ccecc2..86a78c2 100755
--- a/build_clang.sh
+++ b/build_clang.sh
@@ -21,7 +21,7 @@ source $BASE_DIR/tools/trap_exit.sh
 MIRROR="https://releases.llvm.org"
 
 if [ -z "$CLANG_VERSION" ]; then
-  CLANG_VERSION=8.0.0
+  CLANG_VERSION=9.0.0
 fi
 
 if [ -z "$INSTALLPREFIX" ]; then