diff --git a/modules/swagger-codegen/src/main/resources/haskell-servant/stack.mustache b/modules/swagger-codegen/src/main/resources/haskell-servant/stack.mustache
index bed581391c..78ed93c541 100644
--- a/modules/swagger-codegen/src/main/resources/haskell-servant/stack.mustache
+++ b/modules/swagger-codegen/src/main/resources/haskell-servant/stack.mustache
@@ -1,8 +1,8 @@
-resolver: lts-5.11
+resolver: lts-8.5
 extra-deps:
-- servant-0.6
-- servant-client-0.6
-- servant-server-0.6
-- http-api-data-0.2.2
+- servant-0.9.1.1
+- servant-client-0.9.1.1
+- servant-server-0.9.1.1
+- http-api-data-0.3.5
 packages:
 - '.'
diff --git a/samples/server/petstore/haskell-servant/stack.yaml b/samples/server/petstore/haskell-servant/stack.yaml
index bed581391c..78ed93c541 100644
--- a/samples/server/petstore/haskell-servant/stack.yaml
+++ b/samples/server/petstore/haskell-servant/stack.yaml
@@ -1,8 +1,8 @@
-resolver: lts-5.11
+resolver: lts-8.5
 extra-deps:
-- servant-0.6
-- servant-client-0.6
-- servant-server-0.6
-- http-api-data-0.2.2
+- servant-0.9.1.1
+- servant-client-0.9.1.1
+- servant-server-0.9.1.1
+- http-api-data-0.3.5
 packages:
 - '.'