diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+1.2.1.0
+=======
+
+* Relax `aeson` bounds.
+
 1.2.0.0
 =======
 
diff --git a/pdf-slave-template.cabal b/pdf-slave-template.cabal
--- a/pdf-slave-template.cabal
+++ b/pdf-slave-template.cabal
@@ -1,5 +1,5 @@
 name:                pdf-slave-template
-version:             1.2.0.0
+version:             1.2.1.0
 synopsis:            Template format definition for pdf-slave tool
 description:         Please see README.md
 homepage:            https://github.com/ncrashed/pdf-slave#readme
@@ -21,7 +21,7 @@
   exposed-modules:     Text.PDF.Slave.Template
   build-depends:
       base              >= 4.7    && < 5
-    , aeson             >= 0.11   && < 0.12
+    , aeson             >= 0.11   && < 1.3
     , base64-bytestring >= 1.0    && < 1.1
     , bytestring        >= 0.10   && < 0.11
     , containers        >= 0.5    && < 0.6