diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,3 +1,7 @@
+## 2.2.1.2
+
+* Allow postgresql-simple 0.5
+
 ## 2.2.1.1
 
 Query pg_catalog instead of information_schema for metadata.
diff --git a/Database/Persist/Postgresql.hs b/Database/Persist/Postgresql.hs
--- a/Database/Persist/Postgresql.hs
+++ b/Database/Persist/Postgresql.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE CPP #-}
 {-# LANGUAGE DataKinds #-}
 {-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE GADTs #-}
@@ -333,8 +334,10 @@
     , (k PS.xml,         convertPV PersistText)
     , (k PS.float4,      convertPV PersistDouble)
     , (k PS.float8,      convertPV PersistDouble)
+#if !MIN_VERSION_postgresql_simple(0,5,0)
     , (k PS.abstime,     convertPV PersistUTCTime)
     , (k PS.reltime,     convertPV PersistUTCTime)
+#endif
     , (k PS.money,       convertPV PersistRational)
     , (k PS.bpchar,      convertPV PersistText)
     , (k PS.varchar,     convertPV PersistText)
diff --git a/persistent-postgresql.cabal b/persistent-postgresql.cabal
--- a/persistent-postgresql.cabal
+++ b/persistent-postgresql.cabal
@@ -1,5 +1,5 @@
 name:            persistent-postgresql
-version:         2.2.1.1
+version:         2.2.1.2
 license:         MIT
 license-file:    LICENSE
 author:          Felipe Lessa, Michael Snoyman <michael@snoyman.com>
@@ -17,7 +17,7 @@
 library
     build-depends:   base                  >= 4.6        && < 5
                    , transformers          >= 0.2.1
-                   , postgresql-simple     >= 0.4.0    && < 0.5
+                   , postgresql-simple     >= 0.4.0    && < 0.6
                    , postgresql-libpq      >= 0.6.1    && < 0.10
                    , persistent            >= 2.2      && < 3
                    , containers            >= 0.2