diff --git a/compiler_base/makefile b/compiler_base/makefile
index 1bb5b642c..3a111b224 100644
--- a/compiler_base/makefile
+++ b/compiler_base/makefile
@@ -28,12 +28,12 @@ test:
 # Unit tests with code cov (Requires rust 1.60+)
 codecov:
 	rustup component add llvm-tools-preview
-	cargo install cargo-llvm-cov
+	cargo install cargo-llvm-cov@0.6.15
 	cargo llvm-cov --workspace --ignore-filename-regex gpyrpc.rs --html --open 
 
 # Unit tests with code cov and output the lcov file (Requires rust 1.60+)
 codecov-lcov:
 	rustup component add llvm-tools-preview
-	cargo install cargo-llvm-cov
+	cargo install cargo-llvm-cov@0.6.15
 	mkdir $(PWD)/.compiler_base
 	cargo llvm-cov --lcov --output-path $(PWD)/.compiler_base/lcov.info --workspace --ignore-filename-regex gpyrpc.rs
diff --git a/kclvm/makefile b/kclvm/makefile
index 755a9df0c..7457831e8 100644
--- a/kclvm/makefile
+++ b/kclvm/makefile
@@ -66,13 +66,13 @@ test:
 # Unit tests with code cov (Requires rust 1.60+)
 codecov:
 	rustup component add llvm-tools-preview
-	cargo install cargo-llvm-cov
+	cargo install cargo-llvm-cov@0.6.15
 	cargo llvm-cov --workspace --ignore-filename-regex gpyrpc.rs --html --open -- --nocapture
 
 # Unit tests with code cov and output the lcov file (Requires rust 1.60+)
 codecov-lcov:
 	rustup component add llvm-tools-preview
-	cargo install cargo-llvm-cov
+	cargo install cargo-llvm-cov@0.6.15
 	rm -rf $(PWD)/.kclvm_cov
 	mkdir $(PWD)/.kclvm_cov
 	cargo llvm-cov --lcov --output-path $(PWD)/.kclvm_cov/lcov.info -r --workspace --ignore-filename-regex gpyrpc.rs -- --nocapture