diff --git a/secp256k1.nim b/secp256k1.nim
index 25f8d1c..3000bff 100644
--- a/secp256k1.nim
+++ b/secp256k1.nim
@@ -317,7 +317,7 @@ func fromRaw*(T: type SkSignature, data: openArray[byte]): SkResult[T] =
 
   ok(T(data: sig))
 
-func fromDer*(T: type SkSignature, data: openarray[byte]): SkResult[T] =
+func fromDer*(T: type SkSignature, data: openArray[byte]): SkResult[T] =
   ## Initialize Secp256k1 `signature` ``sig`` from DER
   ## representation ``data``.
   if len(data) < 1:
@@ -341,7 +341,7 @@ func toRaw*(sig: SkSignature): array[SkRawSignatureSize, byte] =
     secp256k1_context_no_precomp, result.ptr0, unsafeAddr sig.data)
   doAssert res == 1, "Can't fail, per documentation"
 
-func toDer*(sig: SkSignature, data: var openarray[byte]): int =
+func toDer*(sig: SkSignature, data: var openArray[byte]): int =
   ## Serialize Secp256k1 `signature` ``sig`` to raw binary form and store it
   ## to ``data``.
   ##
diff --git a/secp256k1.nimble b/secp256k1.nimble
index ded90fa..961bf68 100644
--- a/secp256k1.nimble
+++ b/secp256k1.nimble
@@ -1,7 +1,7 @@
 mode = ScriptMode.Verbose
 
 packageName   = "secp256k1"
-version       = "0.5.1"
+version       = "0.5.2"
 author        = "Status Research & Development GmbH"
 description   = "A wrapper for the libsecp256k1 C library"
 license       = "Apache License 2.0"
@@ -18,7 +18,7 @@ proc test(env, path: string) =
     lang = getEnv"TEST_LANG"
 
   exec "nim " & lang & " " & env &
-    " -r -f --hints:off --skipParentCfg " & path
+    " -r -f --hints:off --styleCheck:usages --styleCheck:error --skipParentCfg " & path
 
 task test, "Tests":
   test "--threads:on", "tests/all_tests"
diff --git a/secp256k1_abi.nim b/secp256k1_abi.nim
index cb7b7ed..ab7746a 100644
--- a/secp256k1_abi.nim
+++ b/secp256k1_abi.nim
@@ -8,13 +8,13 @@ const
   srcPath = internalPath & "/src"
   secpSrc = srcPath & "/secp256k1.c"
 
-{.passC: "-I" & quoteShell(wrapperPath).}
-{.passC: "-I" & quoteShell(internalPath).}
-{.passC: "-I" & quoteShell(srcPath).}
-{.passC: "-DHAVE_CONFIG_H".}
+{.passc: "-I" & quoteShell(wrapperPath).}
+{.passc: "-I" & quoteShell(internalPath).}
+{.passc: "-I" & quoteShell(srcPath).}
+{.passc: "-DHAVE_CONFIG_H".}
 
 when defined(gcc) or defined(clang):
-  {.passC: "-DHAVE_BUILTIN_EXPECT"}
+  {.passc: "-DHAVE_BUILTIN_EXPECT"}
 
 {.compile: secpSrc.}