diff --git a/paddle/scripts/paddle_build.sh b/paddle/scripts/paddle_build.sh
index 4bd93da72ef682cedf585871dc764da2a4da32c5..921455d52eccc391635c7bdf10da098fcf221824 100755
--- a/paddle/scripts/paddle_build.sh
+++ b/paddle/scripts/paddle_build.sh
@@ -580,7 +580,8 @@ function generate_api_spec() {
     cd ${PADDLE_ROOT}/build/.check_api_workspace
     virtualenv .${spec_kind}_env
     source .${spec_kind}_env/bin/activate
-    pip install ${PADDLE_ROOT}/build/python/dist/*whl
+    pip install -r ${PADDLE_ROOT}/python/requirements.txt
+    pip --no-cache-dir install ${PADDLE_ROOT}/build/python/dist/*whl
     spec_path=${PADDLE_ROOT}/paddle/fluid/API_${spec_kind}.spec
     python ${PADDLE_ROOT}/tools/print_signatures.py paddle > $spec_path
 
diff --git a/python/requirements.txt b/python/requirements.txt
index 76e6b5dedbeaf8acf726b634e3579f980ff9702f..28c84c1d630a66077a737a48bb8a26200ec48f0b 100644
--- a/python/requirements.txt
+++ b/python/requirements.txt
@@ -1,3 +1,4 @@
+opencv-python<=4.2.0.32
 requests>=2.20.0
 numpy>=1.13, <=1.16.4 ; python_version<"3.5"
 numpy>=1.13 ; python_version>="3.5"