diff --git a/dbapi.cabal b/dbapi.cabal
index 59eef5e40..22493723a 100644
--- a/dbapi.cabal
+++ b/dbapi.cabal
@@ -28,11 +28,12 @@ library
                      , PgQuery
                      , RangeQuery
   other-extensions:    OverloadedStrings
+  ghc-options:         -Wall -W -Werror
   hs-source-dirs:      src
 
 executable dbapi
   main-is:             Main.hs
-  ghc-options:         -Wall
+  ghc-options:         -Wall -W -Werror
   build-depends:       base >=4.6 && <5
                      , HDBC, HDBC-postgresql
                      , warp, wai >= 3.0.1 && < 3.0.2
@@ -54,7 +55,7 @@ Test-Suite spec
   Type:                exitcode-stdio-1.0
   Default-Language:    Haskell2010
   Hs-Source-Dirs:      test, src
-  Ghc-Options:         -Wall
+  ghc-options:         -Wall -W -Werror
   Main-Is:             Main.hs
   Other-Modules:       Dbapi, Spec, SpecHelper
   Build-Depends:       base, hspec2