diff --git a/requirements.txt b/requirements.txt
index 494505d..9215d36 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,4 +6,4 @@ jsonschema==2.6.0
 MarkupSafe==1.0
 six==1.11.0
 git+https://github.com/igordejanovic/textX.git#egg=textX
-websockets==3.4
\ No newline at end of file
+websockets==9.1
\ No newline at end of file
diff --git a/setup.py b/setup.py
index c2f0342..8ba0f6b 100644
--- a/setup.py
+++ b/setup.py
@@ -37,7 +37,7 @@
         'jsonschema==2.6.0',
         'MarkupSafe==1.0',
         'six==1.11.0',
-        'websockets==3.4',
+        'websockets==9.1',
         'Arpeggio==1.7',
         'textX'
     ],