diff --git a/activate.sh b/activate.sh
old mode 100644
new mode 100755
index d52aaac..027ad9a
--- a/activate.sh
+++ b/activate.sh
@@ -1,5 +1,7 @@
 #!/bin/env bash
 
+set -e
+
 export PYENV_ROOT="$HOME/.pyenv"
 [[ -d $PYENV_ROOT/bin ]] && export PATH="$PYENV_ROOT/bin:$PATH"
 eval "$(pyenv init -)"