diff --git a/lambda-calculator.cabal b/lambda-calculator.cabal
index c37d463bc1a9f994209a8b69ac1440abc1a84b42..459394e451a3e5f0ec9db7b352fecdcb09313fec 100644
--- a/lambda-calculator.cabal
+++ b/lambda-calculator.cabal
@@ -36,7 +36,7 @@ executable lambda-calculator
   ghc-options:         -threaded -rtsopts -with-rtsopts=-N
   build-depends:       base,
                        lambda-calculator,
-                       optparse-applicative,
+                       optparse-applicative < 0.13,
                        Shellac,
                        Shellac-readline
   default-language:    Haskell2010
diff --git a/stack.yaml b/stack.yaml
index 73cfc5dd3d471e05fd6b250baaeed0ba297371f0..a71357a24dd8750432a33906054ef2f19798268a 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -5,4 +5,4 @@ packages:
 extra-deps:
 - Shellac-0.9.9
 - Shellac-readline-0.9.9
-resolver: lts-7.0
+resolver: lts-7.14