diff --git a/config.sh b/config.sh
index 0977516..a5fe43c 100644
--- a/config.sh
+++ b/config.sh
@@ -5,7 +5,7 @@ export ROOT=`pwd`
 export TEXINPUTS=".:${ROOT}/tools/style//::"
 
 # activate virtual env
-. ./venv/bin/activate
+source ./.venv/bin/activate
 
 goroot(){
     cd $ROOT