diff --git a/lackey.cabal b/lackey.cabal
--- a/lackey.cabal
+++ b/lackey.cabal
@@ -3,7 +3,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           lackey
-version:        0.4.0
+version:        0.4.1
 synopsis:       Generate Ruby clients from Servant APIs.
 description:    Lackey generates Ruby clients from Servant APIs.
 category:       Web
@@ -31,8 +31,8 @@
   ghc-options: -Wall
   build-depends:
       base >=4.8 && <4.10
-    , servant >=0.8 && <0.9
-    , servant-foreign >=0.5 && <0.9
+    , servant >=0.8 && <0.10
+    , servant-foreign >=0.8 && <0.10
     , text >=1.2 && <1.3
   exposed-modules:
       Lackey
diff --git a/package.yaml b/package.yaml
--- a/package.yaml
+++ b/package.yaml
@@ -11,8 +11,8 @@
 library:
   dependencies:
   - base >=4.8 && <4.10
-  - servant >=0.8 && <0.9
-  - servant-foreign >=0.5 && <0.9
+  - servant >=0.8 && <0.10
+  - servant-foreign >=0.8 && <0.10
   - text >=1.2 && <1.3
   source-dirs: library
 license: MIT
@@ -34,4 +34,4 @@
     - -with-rtsopts=-N
     source-dirs: test-suite
     main: Main.hs
-version: '0.4.0'
+version: '0.4.1'
diff --git a/stack.yaml b/stack.yaml
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,4 +1,1 @@
-extra-deps:
-- servant-0.8
-- servant-foreign-0.8
-resolver: nightly-2016-08-23
+resolver: nightly-2016-09-21