diff --git a/fission-python/create-project.sh b/fission-python/create-project.sh
index 0f951ae..05954fc 100755
--- a/fission-python/create-project.sh
+++ b/fission-python/create-project.sh
@@ -56,31 +56,31 @@ rsync -av --exclude='.git' --exclude='__pycache__' --exclude='*.pyc' --exclude='
 
 # 1. deployment.json - replace ${PROJECT_NAME} and old eom-quota references
 if [[ -f "$PROJECT_PATH/.fission/deployment.json" ]]; then
-    sed -i "s/\${PROJECT_NAME}/$PROJECT_NAME/g" "$PROJECT_PATH/.fission/deployment.json"
-    sed -i "s/eom-quota/$PROJECT_NAME/g" "$PROJECT_PATH/.fission/deployment.json"
-    sed -i "s/fission-eom-quota/fission-$PROJECT_NAME/g" "$PROJECT_PATH/.fission/deployment.json"
+    sed -i '' "s/\${PROJECT_NAME}/$PROJECT_NAME/g" "$PROJECT_PATH/.fission/deployment.json"
+    sed -i '' "s/eom-quota/$PROJECT_NAME/g" "$PROJECT_PATH/.fission/deployment.json"
+    sed -i '' "s/fission-eom-quota/fission-$PROJECT_NAME/g" "$PROJECT_PATH/.fission/deployment.json"
 fi
 
 # 2. Override files - dev-deployment.json and local-deployment.json
 for override in dev-deployment.json local-deployment.json; do
     if [[ -f "$PROJECT_PATH/.fission/$override" ]]; then
-        sed -i "s/\${PROJECT_NAME}/$PROJECT_NAME/g" "$PROJECT_PATH/.fission/$override"
-        sed -i "s/eom-quota/$PROJECT_NAME/g" "$PROJECT_PATH/.fission/$override"
-        sed -i "s/fission-eom-quota/fission-$PROJECT_NAME/g" "$PROJECT_PATH/.fission/$override"
+        sed -i '' "s/\${PROJECT_NAME}/$PROJECT_NAME/g" "$PROJECT_PATH/.fission/$override"
+        sed -i '' "s/eom-quota/$PROJECT_NAME/g" "$PROJECT_PATH/.fission/$override"
+        sed -i '' "s/fission-eom-quota/fission-$PROJECT_NAME/g" "$PROJECT_PATH/.fission/$override"
     fi
 done
 
 # 3. helpers.py - update SECRET_NAME and CONFIG_NAME
 if [[ -f "$PROJECT_PATH/src/helpers.py" ]]; then
-    sed -i "s/\${PROJECT_NAME}/$PROJECT_NAME/g" "$PROJECT_PATH/src/helpers.py"
+    sed -i '' "s/\${PROJECT_NAME}/$PROJECT_NAME/g" "$PROJECT_PATH/src/helpers.py"
 fi
 
 # 4. README.md - update with project name and clean up
 if [[ -f "$PROJECT_PATH/README.md" ]]; then
-    sed -i "s/\${PROJECT_NAME}/$PROJECT_NAME/g" "$PROJECT_PATH/README.md"
-    sed -i "s/^# Fission Python Template/# $PROJECT_NAME/g" "$PROJECT_PATH/README.md"
-    sed -i "s/your-service-py/$PROJECT_NAME-py/g" "$PROJECT_PATH/README.md"
-    sed -i "s/your-package/$PROJECT_NAME/g" "$PROJECT_PATH/README.md"
+    sed -i '' "s/\${PROJECT_NAME}/$PROJECT_NAME/g" "$PROJECT_PATH/README.md"
+    sed -i '' "s/^# Fission Python Template/# $PROJECT_NAME/g" "$PROJECT_PATH/README.md"
+    sed -i '' "s/your-service-py/$PROJECT_NAME-py/g" "$PROJECT_PATH/README.md"
+    sed -i '' "s/your-package/$PROJECT_NAME/g" "$PROJECT_PATH/README.md"
 fi
 
 # ========== VALIDATION ==========