diff --git a/servant-client-core/src/Servant/Client/Core/Request.hs b/servant-client-core/src/Servant/Client/Core/Request.hs
index 431b1f07..86a9cb74 100644
--- a/servant-client-core/src/Servant/Client/Core/Request.hs
+++ b/servant-client-core/src/Servant/Client/Core/Request.hs
@@ -53,7 +53,7 @@ import           Network.HTTP.Types
                  (Header, HeaderName, HttpVersion (..), Method, QueryItem,
                  http11, methodGet)
 import           Servant.API
-                 (ToHttpApiData, toEncodedUrlPiece, toHeader, SourceIO)
+                 (ToHttpApiData, toEncodedQueryParam, toHeader, SourceIO)
 
 import Servant.Client.Core.Internal (mediaTypeRnf)
 
@@ -165,7 +165,7 @@ appendToQueryString pname pvalue req
 -- | Encode a query parameter value.
 --
 encodeQueryParamValue :: ToHttpApiData a => a  -> BS.ByteString
-encodeQueryParamValue = LBS.toStrict . Builder.toLazyByteString . toEncodedUrlPiece
+encodeQueryParamValue = LBS.toStrict . Builder.toLazyByteString . toEncodedQueryParam
 
 -- | Add header to the request being constructed.
 --
diff --git a/servant-client/test/Servant/ClientTestUtils.hs b/servant-client/test/Servant/ClientTestUtils.hs
index b548c40f..80875d5e 100644
--- a/servant-client/test/Servant/ClientTestUtils.hs
+++ b/servant-client/test/Servant/ClientTestUtils.hs
@@ -368,8 +368,8 @@ pathGen = fmap NonEmpty path
 newtype UrlEncodedByteString = UrlEncodedByteString { unUrlEncodedByteString :: ByteString }
 
 instance ToHttpApiData UrlEncodedByteString where
-    toEncodedUrlPiece = byteString . HTTP.urlEncode True . unUrlEncodedByteString
-    toUrlPiece = decodeUtf8 . HTTP.urlEncode True . unUrlEncodedByteString
+    toEncodedQueryParam = byteString . HTTP.urlEncode True . unUrlEncodedByteString
+    toQueryParam = decodeUtf8 . HTTP.urlEncode True . unUrlEncodedByteString
 
 instance FromHttpApiData UrlEncodedByteString where
     parseUrlPiece = pure . UrlEncodedByteString . HTTP.urlDecode True . encodeUtf8
diff --git a/servant-server/servant-server.cabal b/servant-server/servant-server.cabal
index 5b61967c..297cd15d 100644
--- a/servant-server/servant-server.cabal
+++ b/servant-server/servant-server.cabal
@@ -73,7 +73,7 @@ library
   -- strict dependency as we re-export 'servant' things.
   build-depends:
       servant             >= 0.19     && < 0.20
-    , http-api-data       >= 0.4.1    && < 0.5.1
+    , http-api-data       >= 0.5.1    && < 0.6
 
   -- Other dependencies: Lower bound around what is in the latest Stackage LTS.
   -- Here can be exceptions if we really need features from the newer versions.
diff --git a/servant/servant.cabal b/servant/servant.cabal
index 461cad47..aaebabeb 100644
--- a/servant/servant.cabal
+++ b/servant/servant.cabal
@@ -92,7 +92,7 @@ library
   -- We depend (heavily) on the API of these packages:
   -- i.e. re-export, or allow using without direct dependency
   build-depends:
-      http-api-data          >= 0.4.1    && < 0.5.1
+      http-api-data          >= 0.5.1    && < 0.6
     , singleton-bool         >= 0.1.4    && < 0.1.7
 
   -- Other dependencies: Lower bound around what is in the latest Stackage LTS.
diff --git a/stack.yaml b/stack.yaml
index 9daaa278..c359f550 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,4 +1,4 @@
-resolver: lts-18.5
+resolver: lts-19.30
 packages:
 - servant-client-core/
 - servant-client/
@@ -18,3 +18,6 @@ packages:
 
 extra-deps:
 - hspec-wai-0.10.1
+- github: fizruk/http-api-data
+  commit: 5408b078d1ee960309a9fc6141b7e14bc903b3a0
+- attoparsec-iso8601-1.1.0.0
diff --git a/stack.yaml.lock b/stack.yaml.lock
index ce72109b..f21ae2ba 100644
--- a/stack.yaml.lock
+++ b/stack.yaml.lock
@@ -7,13 +7,31 @@ packages:
 - completed:
     hackage: hspec-wai-0.10.1@sha256:56dd9ec1d56f47ef1946f71f7cbf070e4c285f718cac1b158400ae5e7172ef47,2290
     pantry-tree:
-      size: 809
       sha256: 17af1c2e709cd84bfda066b9ebb04cdde7f92660c51a1f7401a1e9f766524e93
+      size: 809
   original:
     hackage: hspec-wai-0.10.1
+- completed:
+    name: http-api-data
+    pantry-tree:
+      sha256: 85b13f87bc1a47a9107dcf9406da94619c13a7040585ffd337a1e89d2aab4e0d
+      size: 1168
+    sha256: 3712b601120361b2977cafb210647c365923c57d9f3fedd4b41874813e36e671
+    size: 24310
+    url: https://github.com/fizruk/http-api-data/archive/5408b078d1ee960309a9fc6141b7e14bc903b3a0.tar.gz
+    version: 0.5.1
+  original:
+    url: https://github.com/fizruk/http-api-data/archive/5408b078d1ee960309a9fc6141b7e14bc903b3a0.tar.gz
+- completed:
+    hackage: attoparsec-iso8601-1.1.0.0@sha256:29d590f21adc4112973ad5e874d095f8b403b886932fe7e15567b239f5483539,1370
+    pantry-tree:
+      sha256: 7eddd7d3bd0f3d51a3b0fe8284ed996bc2bf83effc8cf6afce360e5f0e54fbe5
+      size: 361
+  original:
+    hackage: attoparsec-iso8601-1.1.0.0
 snapshots:
 - completed:
-    size: 585817
-    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/18/5.yaml
-    sha256: 22d24d0dacad9c1450b9a174c28d203f9bb482a2a8da9710a2f2a9f4afee2887
-  original: lts-18.5
+    sha256: 9a74d76d250a455d9cd11e74f157e087787fa9aa3c4264e69c94703d1e71aede
+    size: 619200
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/19/30.yaml
+  original: lts-19.30