diff --git a/core/build-support/lint_exclusions.txt b/core/build-support/lint_exclusions.txt
index 226db75a43..2be060f121 100644
--- a/core/build-support/lint_exclusions.txt
+++ b/core/build-support/lint_exclusions.txt
@@ -6,4 +6,5 @@
 *easylogging++*
 *SqliteMetaImpl.cpp
 *src/grpc*
+*src/external*
 *milvus/include*
\ No newline at end of file
diff --git a/core/coverage.sh b/core/coverage.sh
index 6db1e18d39..5792af5ec2 100755
--- a/core/coverage.sh
+++ b/core/coverage.sh
@@ -122,7 +122,8 @@ ${LCOV_CMD} -r "${FILE_INFO_OUTPUT}" -o "${FILE_INFO_OUTPUT_NEW}" \
     "*/src/server/DBWrapper.cpp" \
     "*/src/server/grpc_impl/GrpcServer.cpp" \
     "*/src/external/easyloggingpp/easylogging++.h" \
-    "*/src/external/easyloggingpp/easylogging++.cc"
+    "*/src/external/easyloggingpp/easylogging++.cc" \
+    "*/src/external/*"
 
 # gen html report
 ${LCOV_GEN_CMD} "${FILE_INFO_OUTPUT_NEW}" --output-directory ${DIR_LCOV_OUTPUT}/