diff --git a/package.yaml b/package.yaml
--- a/package.yaml
+++ b/package.yaml
@@ -23,7 +23,7 @@
   default-extensions:
   - Strict
   dependencies:
-  - aeson >=0.11 && <1.1
+  - aeson >=0.11 && <1.2
   - aeson-casing >=0.1 && <0.2
   - base >=4.9 && <4.10
   - bimap >=0.3 && <0.4
@@ -58,4 +58,4 @@
     - -with-rtsopts=-N
     main: Main.hs
     source-dirs: source/tests
-version: '2.1.0'
+version: '2.1.1'
diff --git a/rattletrap.cabal b/rattletrap.cabal
--- a/rattletrap.cabal
+++ b/rattletrap.cabal
@@ -3,7 +3,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           rattletrap
-version:        2.1.0
+version:        2.1.1
 synopsis:       Parse and generate Rocket League replays.
 description:    Rattletrap parses and generates Rocket League replays.
 category:       Game
@@ -82,7 +82,7 @@
   default-extensions: Strict
   ghc-options: -Wall
   build-depends:
-      aeson >=0.11 && <1.1
+      aeson >=0.11 && <1.2
     , aeson-casing >=0.1 && <0.2
     , base >=4.9 && <4.10
     , bimap >=0.3 && <0.4
diff --git a/stack.yaml b/stack.yaml
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,1 +1,1 @@
-resolver: nightly-2016-12-14
+resolver: nightly-2016-12-31