diff --git a/package-lock.json b/package-lock.json
index f542d17df5..7478bc0d13 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "origintrail_node",
-  "version": "2.0.53",
+  "version": "2.0.54",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 58f3398814..feb59a8be5 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "origintrail_node",
-  "version": "2.0.53",
+  "version": "2.0.54",
   "description": "OriginTrail node",
   "main": ".eslintrc.js",
   "config": {
diff --git a/testnet/supervisor-event-listener.py b/testnet/supervisor-event-listener.py
index bc3c8135ba..5732bd007a 100644
--- a/testnet/supervisor-event-listener.py
+++ b/testnet/supervisor-event-listener.py
@@ -1,5 +1,6 @@
 import sys
 import os
+import signal
 
 def write_stdout(s):
     # only eventlistener protocol messages may be sent to stdout
@@ -36,4 +37,3 @@ def main():
 
 if __name__ == '__main__':
     main()
-