diff --git a/README.md b/README.md
index d72463a..9e0c51c 100644
--- a/README.md
+++ b/README.md
@@ -38,3 +38,13 @@ echo totp.now()
 This library uses the wonderful [stack_strings](https://github.com/termermc/nim-stack-strings) library for secrets.
 Meaning secrets are fixed length one can use `--otp.secretSize:50` to override the size.
 By default the secret length is 32 bytes.
+Due to this the best way to handle secrets is as follows:
+```nim
+let mySecret = "S3cret"
+if mySecret.len < secretSize:
+  let hotp = Hotp.init(mySecret)
+  assert hotp.at(0) == 755224
+else:
+  # Do something errory here
+  raise (ref ValueError)(msg: "Secret size too large")
+```
diff --git a/otp.nim b/otp.nim
index 63fed54..13583b4 100644
--- a/otp.nim
+++ b/otp.nim
@@ -14,7 +14,7 @@ from math import pow
 from times import epochTime
 import stack_strings as stackstrings
 
-const secretSize {.intDefine: "otp.secretSize".} = 32
+const secretSize* {.intDefine: "otp.secretSize".} = 32
 
 type
   OneTimePasswordDefect = object of Defect
@@ -34,8 +34,8 @@ when NimMajor >= 2:
   proc `=dup`(_: HOTP): HOTP {.error: hookStr.}
   proc `=dup`(_: TOTP): TOTP {.error: hookStr.}
   
-proc `=copy`(_: var HOTP, _: HOTP){.error: hookStr}
-proc `=copy`(_: var TOTP, _: TOTP){.error: hookStr}
+proc `=copy`(a: var HOTP, b: HOTP){.error: hookStr}
+proc `=copy`(a: var TOTP, b: TOTP){.error: hookStr}
 
 proc init*(_: typedesc[HOTP], secret: static openArray[char], digits: int = 6): HOTP =
   when secret.len > secretSize:
diff --git a/otp.nimble b/otp.nimble
index 1420dd0..f44d216 100644
--- a/otp.nimble
+++ b/otp.nimble
@@ -1,13 +1,13 @@
 [Package]
 name          = "otp"
-version       = "0.3.1"
+version       = "0.3.2"
 author        = "Huy Doan"
 description   = "One Time Password library for Nim"
 license       = "MIT"
 skipDirs      = @["tests"]
 
 [Deps]
-Requires: "nim >= 1.6.10"
+Requires: "nim >= 1.6.14"
 Requires: "hmac >= 0.3.1"
 Requires: "base32 >= 0.1.3"
-Requires: "stack_strings >= 1.1.2"
+Requires: "stack_strings >= 1.1.3"