diff --git a/syncplayClient.py b/syncplayClient.py
index f0b8be3..3cb47e7 100755
--- a/syncplayClient.py
+++ b/syncplayClient.py
@@ -1,9 +1,16 @@
 #!/usr/bin/env python
 
-import site
+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!")
+
 from syncplay.clientManager import SyncplayClientManager
 from syncplay.utils import blackholeStdoutForFrozenWindow
 
diff --git a/syncplayServer.py b/syncplayServer.py
index e441a5f..cf358b4 100755
--- a/syncplayServer.py
+++ b/syncplayServer.py
@@ -1,10 +1,17 @@
 #!/usr/bin/env python
 #coding:utf8
 
-import site
+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!")
+
 from twisted.internet import reactor
 
 from syncplay.server import SyncFactory, ConfigurationGetter