diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+v0.3.1.2
+
+  * Push bounds for the container package
+
 v0.3.1.1
 
   * Merged [Typetetris](https://github.com/typetetris) PR, making the package compatible with GHC 8.4+
diff --git a/fastparser.cabal b/fastparser.cabal
--- a/fastparser.cabal
+++ b/fastparser.cabal
@@ -1,5 +1,5 @@
 name:                fastparser
-version:             0.3.1.1
+version:             0.3.1.2
 synopsis:            A fast, but bare bones, bytestring parser combinators library.
 description:         Please see README.md
 homepage:            https://github.com/bartavelle/fastparser#readme
@@ -12,7 +12,7 @@
 build-type:          Simple
 extra-source-files:  CHANGELOG.md, README.md
 cabal-version:       >=1.10
-Tested-With:         GHC == 7.10.2, GHC == 8.0.2, GHC == 8.2.1
+Tested-With:         GHC == 7.10.2, GHC == 8.0.2, GHC == 8.2.2, GHC == 8.4.4, GHC == 8.6.4
 
 library
   hs-source-dirs:      src
@@ -23,7 +23,7 @@
                      , vector-space      >= 0.10 && < 1
                      , microlens         == 0.4.*
                      , bytestring-lexing == 0.5.*
-                     , containers        == 0.5.*
+                     , containers        >= 0.5 && < 0.7
                      , kan-extensions    == 5.*
                      , transformers      >= 0.4
   ghc-options:         -O2 -Wall