diff --git a/language-ecmascript.cabal b/language-ecmascript.cabal
index 0119be2f..dfc8c382 100644
--- a/language-ecmascript.cabal
+++ b/language-ecmascript.cabal
@@ -35,10 +35,10 @@ Library
   Hs-Source-Dirs:
     src
   Build-Depends:
-    base >= 4 && < 4.19,
+    base >= 4 && < 4.20,
     mtl >= 1 && < 3,
     parsec > 3 && < 3.2.0,
-    ansi-wl-pprint >= 0.6 && < 1,
+    ansi-wl-pprint >= 0.6 && < 2,
     containers == 0.*,
     uniplate >= 1.6 && <1.7,
     data-default-class >= 0.0.1 && < 0.2,
diff --git a/stack.yaml b/stack.yaml
index ac925750..3e106663 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -3,7 +3,7 @@
 # Specifies the GHC version and set of packages available (e.g., lts-3.5, nightly-2015-09-21, ghc-7.10.2)
 # resolver: lts-8.22
 #resolver: lts-11.4
-resolver: nightly-2020-01-21
+resolver: lts-23.19
 
 # Local packages, usually specified by relative directory name
 packages: