diff --git a/VERSION b/VERSION
index cfc730712..450a687b2 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.28.0
+1.28.1
diff --git a/setup/tue-env.bash b/setup/tue-env.bash
index f15cca07e..bc5be88c9 100644
--- a/setup/tue-env.bash
+++ b/setup/tue-env.bash
@@ -18,6 +18,11 @@ function _tue-env-deactivate-current-env
     do
         unset "${var}"
     done
+    for var in ${!ROS_*}
+    do
+        unset "${var}"
+    done
+    unset PYTHONPATH
 
     return 0
 }