diff --git a/openapi3-code-generator.cabal b/openapi3-code-generator.cabal
--- a/openapi3-code-generator.cabal
+++ b/openapi3-code-generator.cabal
@@ -1,18 +1,24 @@
 cabal-version: 1.12
-name: openapi3-code-generator
-version: 0.1.0.2
-license: MIT
-license-file: LICENSE
-copyright: 2020 Remo Dörig & Joel Fisch
-maintainer: Joel Fisch <joel.fisch96@gmail.com> & Remo Dörig <remo.doerig@gmail.com>
-author: Remo Dörig & Joel Fisch
-homepage: https://github.com/Haskell-OpenAPI-Code-Generator/Haskell-OpenAPI-Client-Code-Generator#readme
-bug-reports: https://github.com/Haskell-OpenAPI-Code-Generator/Haskell-OpenAPI-Client-Code-Generator/issues
-synopsis: OpenAPI3 Haskell Client Code Generator
-description:
-    Please see the README on GitHub at <https://github.com/Haskell-OpenAPI-Code-Generator/Haskell-OpenAPI-Client-Code-Generator#readme>
-category: Code-Generator
-build-type: Simple
+
+-- This file has been generated from package.yaml by hpack version 0.33.0.
+--
+-- see: https://github.com/sol/hpack
+--
+-- hash: 93f2838ca8b420e4def924dc107fa4b207fabde3bdc91dec0756e97c7e4905f0
+
+name:           openapi3-code-generator
+version:        0.1.0.3
+license:        MIT
+license-file:   LICENSE
+copyright:      2020 Remo Dörig & Joel Fisch
+maintainer:     Joel Fisch <joel.fisch96@gmail.com> & Remo Dörig <remo.doerig@gmail.com>
+author:         Remo Dörig & Joel Fisch
+homepage:       https://github.com/Haskell-OpenAPI-Code-Generator/Haskell-OpenAPI-Client-Code-Generator#readme
+bug-reports:    https://github.com/Haskell-OpenAPI-Code-Generator/Haskell-OpenAPI-Client-Code-Generator/issues
+synopsis:       OpenAPI3 Haskell Client Code Generator
+description:    Please see the README on GitHub at <https://github.com/Haskell-OpenAPI-Code-Generator/Haskell-OpenAPI-Client-Code-Generator#readme>
+category:       Code-Generator
+build-type:     Simple
 extra-source-files:
     README.md
     ChangeLog.md
@@ -41,68 +47,71 @@
         OpenAPI.Generate.Types.ExternalDocumentation
         OpenAPI.Generate.Types.Referencable
         OpenAPI.Generate.Types.Schema
-    hs-source-dirs: src
+    hs-source-dirs:
+        src
     other-modules:
         Paths_openapi3_code_generator
     default-language: Haskell2010
     ghc-options: -Wall
     build-depends:
-        aeson >=1.4.6.0 && <1.5,
+        aeson,
         base >=4.7 && <5,
-        bytestring >=0.10.10.0 && <0.11,
-        containers >=0.6.2.1 && <0.7,
-        hashmap >=1.3.3 && <1.4,
-        http-client >=0.6.4 && <0.7,
-        http-conduit >=2.3.7.3 && <2.4,
-        http-types >=0.12.3 && <0.13,
-        mtl >=2.2.2 && <2.3,
-        options >=1.2.1.1 && <1.3,
-        scientific >=0.3.6.2 && <0.4,
-        split >=0.2.3.4 && <0.3,
-        template-haskell >=2.15.0.0 && <2.16,
-        text >=1.2.4.0 && <1.3,
-        time >=1.9.3 && <1.10,
-        transformers >=0.5.6.2 && <0.6,
-        unordered-containers >=0.2.10.0 && <0.3,
-        vector >=0.12.1.2 && <0.13,
-        yaml >=0.11.2.0 && <0.12
+        bytestring,
+        containers,
+        hashmap,
+        http-client,
+        http-conduit,
+        http-types,
+        mtl,
+        options,
+        scientific,
+        split,
+        template-haskell,
+        text,
+        time,
+        transformers,
+        unordered-containers,
+        vector,
+        yaml
 
 executable openapi3-code-generator-exe
     main-is: Main.hs
-    hs-source-dirs: app
+    hs-source-dirs:
+        app
     other-modules:
         Embed
         Paths_openapi3_code_generator
     default-language: Haskell2010
     ghc-options: -threaded -rtsopts -with-rtsopts=-N -Wall
     build-depends:
-        aeson >=1.4.6.0 && <1.5,
+        aeson,
         base >=4.7 && <5,
-        bytestring >=0.10.10.0 && <0.11,
-        containers >=0.6.2.1 && <0.7,
-        directory >=1.3.4.0 && <1.4,
-        filepath >=1.4.2.1 && <1.5,
-        hashmap >=1.3.3 && <1.4,
-        http-client >=0.6.4 && <0.7,
-        http-conduit >=2.3.7.3 && <2.4,
-        http-types >=0.12.3 && <0.13,
-        mtl >=2.2.2 && <2.3,
-        openapi3-code-generator -any,
-        options >=1.2.1.1 && <1.3,
-        scientific >=0.3.6.2 && <0.4,
-        split >=0.2.3.4 && <0.3,
-        template-haskell >=2.15.0.0 && <2.16,
-        text >=1.2.4.0 && <1.3,
-        time >=1.9.3 && <1.10,
-        transformers >=0.5.6.2 && <0.6,
-        unordered-containers >=0.2.10.0 && <0.3,
-        vector >=0.12.1.2 && <0.13,
-        yaml >=0.11.2.0 && <0.12
+        bytestring,
+        containers,
+        directory,
+        filepath,
+        hashmap,
+        http-client,
+        http-conduit,
+        http-types,
+        mtl,
+        openapi3-code-generator,
+        options,
+        scientific,
+        split,
+        template-haskell,
+        text,
+        time,
+        transformers,
+        unordered-containers,
+        vector,
+        yaml
 
 test-suite openapi3-code-generator-test
     type: exitcode-stdio-1.0
     main-is: Spec.hs
-    hs-source-dirs: test
+    hs-source-dirs:
+        test
     other-modules:
         OpenAPI.Generate.DocSpec
         OpenAPI.Generate.Internal.UtilSpec
@@ -115,30 +124,30 @@
     default-language: Haskell2010
     ghc-options: -threaded -rtsopts -with-rtsopts=-N -Wall
     build-depends:
-        QuickCheck >=2.13.2 && <2.14,
-        aeson >=1.4.6.0 && <1.5,
+        QuickCheck,
+        aeson,
         base >=4.7 && <5,
-        bytestring >=0.10.10.0 && <0.11,
-        containers >=0.6.2.1 && <0.7,
-        genvalidity >=0.10.0.1 && <0.11,
-        genvalidity-hspec >=0.7.0.4 && <0.8,
-        genvalidity-text >=0.7.0.2 && <0.8,
-        hashmap >=1.3.3 && <1.4,
-        hspec >=2.7.1 && <2.8,
-        http-client >=0.6.4 && <0.7,
-        http-conduit >=2.3.7.3 && <2.4,
-        http-types >=0.12.3 && <0.13,
-        mtl >=2.2.2 && <2.3,
-        openapi3-code-generator -any,
-        options >=1.2.1.1 && <1.3,
-        scientific >=0.3.6.2 && <0.4,
-        split >=0.2.3.4 && <0.3,
-        template-haskell >=2.15.0.0 && <2.16,
-        text >=1.2.4.0 && <1.3,
-        time >=1.9.3 && <1.10,
-        transformers >=0.5.6.2 && <0.6,
-        unordered-containers >=0.2.10.0 && <0.3,
-        validity >=0.9.0.3 && <0.10,
-        validity-text >=0.3.1.1 && <0.4,
-        vector >=0.12.1.2 && <0.13,
-        yaml >=0.11.2.0 && <0.12
+        bytestring,
+        containers,
+        genvalidity,
+        genvalidity-hspec,
+        genvalidity-text,
+        hashmap,
+        hspec,
+        http-client,
+        http-conduit,
+        http-types,
+        mtl,
+        openapi3-code-generator,
+        options,
+        scientific,
+        split,
+        template-haskell,
+        text,
+        time,
+        transformers,
+        unordered-containers,
+        validity,
+        validity-text,
+        vector,
+        yaml
diff --git a/src/OpenAPI/Generate.hs b/src/OpenAPI/Generate.hs
--- a/src/OpenAPI/Generate.hs
+++ b/src/OpenAPI/Generate.hs
@@ -48,6 +48,7 @@
 defineConfigurationInformation moduleName spec =
   let servers' = (OAT.servers :: OAT.OpenApiSpecification -> [OAT.ServerObject]) spec
       defaultURL = getServerURL servers'
+      defaultURLStr = T.unpack defaultURL
       defaultURLName = mkName "defaultURL"
       getServerURL = maybe "/" (OAT.url :: OAT.ServerObject -> Text) . Maybe.listToMaybe
    in Doc.addConfigurationModuleHeader moduleName
@@ -60,7 +61,7 @@
                     "@" <> defaultURL <> "@"
                   ],
               ppr
-                <$> [d|$(varP defaultURLName) = defaultURL|],
+                <$> [d|$(varP defaultURLName) = T.pack defaultURLStr|],
               pure $ Doc.generateHaddockComment ["The default configuration containing the 'defaultURL' and no authorization"],
               ppr <$> [d|$(varP $ mkName "defaultConfiguration") = OC.Configuration $(varE defaultURLName) OC.AnonymousSecurityScheme|]
             ]
diff --git a/src/OpenAPI/Generate/Internal/Operation.hs b/src/OpenAPI/Generate/Internal/Operation.hs
--- a/src/OpenAPI/Generate/Internal/Operation.hs
+++ b/src/OpenAPI/Generate/Internal/Operation.hs
@@ -188,6 +188,7 @@
       namedQueryParameters = filter ((== OAT.QueryParameterObjectLocation) . getInFromParameterObject . snd) namedParameters
       queryParameters = generateQueryParams namedQueryParameters
       bodyName = mkName "body"
+      strMethod = T.unpack method
   pure $
     ppr <$> case bodySchema of
       Just RequestBodyDefinition {..} ->
@@ -203,7 +204,7 @@
                          then [|OC.doBodyCallWithConfiguration $(varE configArg)|]
                          else [|OC.doBodyCallWithConfigurationM|]
                      )
-                    (T.toUpper method)
+                    (T.toUpper $ T.pack strMethod)
                     (T.pack $(request))
                     $(queryParameters)
                     $(if required then [|Just $(varE bodyName)|] else varE bodyName)
@@ -218,7 +219,7 @@
                      then [|OC.doCallWithConfiguration $(varE configArg)|]
                      else [|OC.doCallWithConfigurationM|]
                  )
-                (T.toUpper method)
+                (T.toUpper $ T.pack strMethod)
                 (T.pack $(request))
                 $(queryParameters)
               )
@@ -297,9 +298,9 @@
 -- | Generates query params in the form of [(Text,ByteString)]
 generateQueryParams :: [(Name, OAT.ParameterObject)] -> Q Exp
 generateQueryParams ((name, param) : xs) =
-  infixE (Just [|(queryName, $(expr))|]) (varE $ mkName ":") (Just $ generateQueryParams xs)
+  infixE (Just [|(T.pack queryName, $(expr))|]) (varE $ mkName ":") (Just $ generateQueryParams xs)
   where
-    queryName = getNameFromParameter param
+    queryName = T.unpack $ getNameFromParameter param
     required = getRequiredFromParameter param
     expr =
       if required
