diff --git a/requirements.txt b/requirements.txt
index 68d6a6f87..0d30ee934 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,7 +17,8 @@ requests>=2.18.4
 tzlocal>=1.5.1
 urllib3<1.23,>=1.21.1
 waitress>=1.1.0
-configparser==3.5.0
+configparser>=3.5.0
+backports.functools-lru-cache>=1.5
 
 #Subliminal requirements
 click>=6.7
@@ -34,4 +35,4 @@ appdirs>=1.4.3
 guessit>=2.1.4
 chardet>=3.0.4
 futures>=3.2.0
-stevedore>=1.28.0
\ No newline at end of file
+stevedore>=1.28.0