diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+0.12.1
+-----------------------------------------------------------------------------
+- Update dependencies.
+
 0.12.0
 -----------------------------------------------------------------------------
 - Remove wait-queue.
diff --git a/cql-io.cabal b/cql-io.cabal
--- a/cql-io.cabal
+++ b/cql-io.cabal
@@ -1,5 +1,5 @@
 name:                 cql-io
-version:              0.12.0
+version:              0.12.1
 synopsis:             Cassandra CQL client.
 stability:            experimental
 license:              OtherLicense
@@ -76,9 +76,9 @@
         , exceptions         >= 0.4     && < 1.0
         , hashable           >= 1.2     && < 2.0
         , iproute            >= 1.3     && < 1.4
-        , lens               >= 4.4     && < 4.5
+        , lens               >= 4.4     && < 5.0
         , monad-control      >= 0.3     && < 1.0
-        , mtl                >= 2.1     && < 2.3
+        , mtl                >= 2.1     && < 2.5
         , mwc-random         >= 0.13    && < 0.14
         , network            >= 2.4     && < 3.0
         , semigroups         >= 0.15    && < 0.16