diff --git a/syncplayClient.py b/syncplayClient.py
index a414f89..6ad0b89 100755
--- a/syncplayClient.py
+++ b/syncplayClient.py
@@ -4,12 +4,12 @@ import site, sys
 
 # libpath
 
-# try:
-#     if (sys.version_info.major != 2) or (sys.version_info.minor < 7):
-#         raise Exception("You must run Syncplay with Python 2.7!")
-# except AttributeError:
-#     import warnings
-#     warnings.warn("You must run Syncplay with Python 2.7!")
+try:
+    if (sys.version_info.major != 3) or (sys.version_info.minor < 5):
+        raise Exception("You must run Syncplay with Python 3.5 or newer!")
+except AttributeError:
+    import warnings
+    warnings.warn("You must run Syncplay with Python 3.5 or newer!")
 
 from syncplay.clientManager import SyncplayClientManager
 from syncplay.utils import blackholeStdoutForFrozenWindow
diff --git a/syncplayServer.py b/syncplayServer.py
index ef9ae95..7cc3ac6 100755
--- a/syncplayServer.py
+++ b/syncplayServer.py
@@ -5,12 +5,12 @@ import site, sys
 
 # libpath
 
-# try:
-#     if (sys.version_info.major != 2) or (sys.version_info.minor < 7):
-#         raise Exception("You must run Syncplay with Python 2.7!")
-# except AttributeError:
-#     import warnings
-#     warnings.warn("You must run Syncplay with Python 2.7!")
+try:
+    if (sys.version_info.major != 3) or (sys.version_info.minor < 5):
+        raise Exception("You must run Syncplay with Python 3.5 or newer!")
+except AttributeError:
+    import warnings
+    warnings.warn("You must run Syncplay with Python 3.5 or newer!")
 
 from twisted.internet import reactor