diff --git a/Changelog.md b/Changelog.md
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,3 +1,9 @@
+## 1.3.12 -- 2020-12-14
+
+* Increased the upper bound of `aeson` to < 1.6.
+* Increased the upper bound of `base` to < 4.15.
+* Increased the upper bound of `bytestring` to < 0.12.
+
 ## 1.3.11 -- 2018-09-30
 
 * Increased the upper bound of `base`.
diff --git a/socket-io.cabal b/socket-io.cabal
--- a/socket-io.cabal
+++ b/socket-io.cabal
@@ -1,5 +1,5 @@
 name: socket-io
-version: 1.3.11
+version: 1.3.12
 homepage: http://github.com/ocharles/engine.io
 license: BSD3
 license-file: LICENSE
@@ -22,10 +22,10 @@
     FlexibleContexts, OverloadedStrings, RankNTypes
 
   build-depends:
-    aeson >=0.7 && <1.5,
+    aeson >=0.7 && <1.6,
     attoparsec >=0.10 && <0.14,
-    base >=4.6 && <4.13,
-    bytestring >=0.10 && <0.11,
+    base >=4.6 && <4.15,
+    bytestring >=0.10 && <0.12,
     engine-io >= 1 && <1.3,
     mtl >=2.1 && <2.3,
     stm >=2.4 && <2.6,