diff --git a/python/paddle_serving_server_gpu/__init__.py b/python/paddle_serving_server_gpu/__init__.py
index 1d94bf3093e6d76b260f53acd0c799080627c0ab..becfbb20090799aaf40d79973964e497cf599436 100644
--- a/python/paddle_serving_server_gpu/__init__.py
+++ b/python/paddle_serving_server_gpu/__init__.py
@@ -235,15 +235,11 @@ class Server(object):
             self.bin_path = os.environ["SERVING_BIN"]
 
     def check_cuda(self):
-        cuda_flag = False
-        r = os.popen("ldd {} | grep cudart".format(self.bin_path))
-        r = r.read().split("=")
-        if len(r) >= 2 and "cudart" in r[1] and os.system(
-                "ls /dev/ | grep nvidia > /dev/null") == 0:
-            cuda_flag = True
-        if not cuda_flag:
+        if os.system("ls /dev/ | grep nvidia > /dev/null") == 0:
+            pass
+        else:
             raise SystemExit(
-                "CUDA not found, please check your environment or use cpu version by \"pip install paddle_serving_server\""
+                "GPU not found, please check your environment or use cpu version by \"pip install paddle_serving_server\""
             )
 
     def set_gpuid(self, gpuid=0):
diff --git a/python/requirements.txt b/python/requirements.txt
index 697b24fd4db6aff6b30913d8a5d23416dc208c80..19d18053504459b2e9c4d2d17cb0aa0243444186 100644
--- a/python/requirements.txt
+++ b/python/requirements.txt
@@ -1,4 +1,5 @@
 numpy>=1.12, <=1.16.4 ; python_version<"3.5"
+opencv-python==4.2.0.32
 google>=2.0.3
 protobuf>=3.12.2
 grpcio-tools>=1.28.1