diff --git a/gibbon-compiler/gibbon.cabal b/gibbon-compiler/gibbon.cabal
index 4d21c6dca..95cebb9a8 100644
--- a/gibbon-compiler/gibbon.cabal
+++ b/gibbon-compiler/gibbon.cabal
@@ -118,9 +118,9 @@ library
                      , GenericPretty            >= 1.2.1     &&  < 2
                      , language-c-quote         >= 0.12.1    &&  < 1
                      , mainland-pretty          >= 0.6.1     &&  < 1
-                     , language-python          >= 0.5.8  
-                     , timeit                   >= 2.0
-                     , time                     >= 1.12.2
+                     , language-python          >= 0.5.0     &&  <= 0.5.8  
+                     , timeit                   >= 0.9       &&  <= 2.0
+                     , time                     >= 1         &&  <= 1.12.2
 -- Brings in lots of ekmett dependencies:
 --                     , either