diff --git a/cyberpanel.sh b/cyberpanel.sh
index 22c403f09..24f092813 100644
--- a/cyberpanel.sh
+++ b/cyberpanel.sh
@@ -476,7 +476,7 @@ EOF
       check_return
     fi
     ln -s /usr/bin/pip3 /usr/bin/pip
-    pip install virtualenv
+    pip install virtualenv==16.7.9
     check_return
 
   fi
@@ -496,7 +496,7 @@ EOF
     DEBIAN_FRONTEND=noninteractive apt install -y python3-venv
     check_return
 
-    pip install virtualenv
+    pip install virtualenv==16.7.9
     check_return
 
   fi
diff --git a/cyberpanel_upgrade.sh b/cyberpanel_upgrade.sh
index ed5906ab6..523d5040a 100644
--- a/cyberpanel_upgrade.sh
+++ b/cyberpanel_upgrade.sh
@@ -304,10 +304,10 @@ else
 fi
 
 if [ $SERVER_OS = "Ubuntu" ]; then
-  pip3 install virtualenv
+  pip3 install virtualenv==16.7.9
   check_return
 else
-  pip3.6 install virtualenv
+  pip3.6 install virtualenv==16.7.9
   check_return
 fi