diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..e562f49
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,33 @@
+language: c
+
+# https://docs.travis-ci.com/user/caching/
+#
+# Caching the whole nim folder is better than relying on ccache - this way, we
+# skip the expensive bootstrap process and linking
+cache:
+  directories:
+    - nim
+
+os:
+  - linux
+  - osx
+
+install:
+  # check version of remote branch
+  - "export NIMVER=$(git ls-remote https://github.com/nim-lang/nim.git HEAD | cut -f 1)"
+
+  # after building nim, wipe csources to save on cache space
+  - "{ [ -f nim/$NIMVER/bin/nim ] && [ -f nim/$NIMVER/bin/nimble ] ; } ||
+      { rm -rf nim ;
+        mkdir -p nim ;
+        git clone --depth=1 https://github.com/nim-lang/nim.git nim/$NIMVER ;
+        cd nim/$NIMVER ;
+        sh build_all.sh ;
+        rm -rf csources ;
+        cd ../.. ;
+      }"
+  - "export PATH=$PWD/nim/$NIMVER/bin:$HOME/.nimble/bin:$PATH"
+
+script:
+  - nimble install -y
+  - nimble test
diff --git a/README.md b/README.md
index 7d50f39..41af599 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-JWT Implementation for Nim-lang
+JWT Implementation for Nim-lang [![Build Status](https://travis-ci.org/yglukhov/nim-jwt.svg?branch=master)](https://travis-ci.org/yglukhov/nim-jwt)
 ===============================
 
 This is a implementation of JSON Web Tokens for Nim, it allows for the following operations to be performed:
diff --git a/src/jwt.nim b/jwt.nim
similarity index 94%
rename from src/jwt.nim
rename to jwt.nim
index e759a3e..05e18c2 100644
--- a/src/jwt.nim
+++ b/jwt.nim
@@ -1,8 +1,8 @@
-import future, json, strutils, tables, times, sequtils
+import json, strutils, tables, times, sequtils
 
-from private/crypto import nil
+from jwt/private/crypto import nil
 
-import private/claims, private/jose, private/utils
+import jwt/private/[claims, jose, utils]
 
 type
   InvalidToken* = object of Exception
@@ -98,7 +98,7 @@ proc signString*(toSign: string, secret: string, algorithm: SignatureAlgorithm =
     return rsSign(crypto.EVP_sha384())
   else:
     raise newException(UnsupportedAlgorithm, $algorithm & " isn't supported")
-  result = join(signature.map((i: uint8) => (toHex(BiggestInt(i), 2))), "")
+  result = join(signature.mapIt(toHex(BiggestInt(it), 2)), "")
 
 # Verify that the token is not tampered with
 proc verifySignature*(data: string, signature: string, secret: string): bool =
diff --git a/jwt.nimble b/jwt.nimble
index 6d783e7..9d9bf40 100644
--- a/jwt.nimble
+++ b/jwt.nimble
@@ -8,4 +8,4 @@ srcDir = "src"
 
 # Deps
 requires "nim >= 0.19.0"
-
+requires "https://github.com/yglukhov/linktools"
diff --git a/src/private/claims.nim b/jwt/private/claims.nim
similarity index 97%
rename from src/private/claims.nim
rename to jwt/private/claims.nim
index 288a722..294a022 100644
--- a/src/private/claims.nim
+++ b/jwt/private/claims.nim
@@ -1,4 +1,4 @@
-import future, json, sequtils, strutils, times, tables
+import json, sequtils, strutils, times, tables
 
 import utils
 
@@ -72,7 +72,7 @@ proc newTimeClaim*(k: ClaimKind, i: int64): Claim =
 
 # Returns the claimKeyms value as a time
 proc getClaimTime*(c: Claim): Time =
-  result = fromSeconds(c.node.num)
+  result = fromUnix(c.node.num)
 
 # NBF
 proc newNBF*(s: string): Claim = return newTimeClaim(NBF, s)
diff --git a/src/private/crypto.nim b/jwt/private/crypto.nim
similarity index 91%
rename from src/private/crypto.nim
rename to jwt/private/crypto.nim
index 27e2725..d7426e0 100644
--- a/src/private/crypto.nim
+++ b/jwt/private/crypto.nim
@@ -1,9 +1,21 @@
-import openssl
+import openssl, linktools
+
+# TODO: Linkage flags should probably need more attention because of different
+# openssl versions. E.g. DigestSign* functions are not available in old openssl.
+when defined(macosx):
+  const libcrypto = "crypto.35"
+else:
+  const libcrypto = "crypto"
+
+{.passL: "-l" & libcrypto.}
+
 export EVP_PKEY_RSA
 
 const
   HMAC_MAX_MD_CBLOCK* = 128
 
+const sslIsOld = libHasSymbol(libcrypto, "EVP_MD_CTX_create")
+
 type
   EVP_MD* = SslPtr
   EVP_MD_CTX* = SslPtr
@@ -35,7 +47,7 @@ proc PEM_read_bio_PrivateKey*(bp: BIO, x: ptr EVP_PKEY,
 proc EVP_PKEY_free*(p: EVP_PKEY)  {.cdecl, importc.}
 
 
-when defined(macosx):
+when sslIsOld:
   proc EVP_MD_CTX_create*(): EVP_MD_CTX {.cdecl, importc.}
   proc EVP_MD_CTX_destroy*(ctx: EVP_MD_CTX) {.cdecl, importc.}
 else:
diff --git a/src/private/jose.nim b/jwt/private/jose.nim
similarity index 100%
rename from src/private/jose.nim
rename to jwt/private/jose.nim
diff --git a/src/private/utils.nim b/jwt/private/utils.nim
similarity index 100%
rename from src/private/utils.nim
rename to jwt/private/utils.nim
diff --git a/tests/t_claims.nim b/tests/t_claims.nim
index 29a8875..88eb629 100644
--- a/tests/t_claims.nim
+++ b/tests/t_claims.nim
@@ -1,21 +1,21 @@
 import json, unittest
 
-import jwt
+import ../jwt
 
 suite "Claim ops":
   test "Create claims from JSON":
-  let asJson = %{
-    "iss": %"jane",
-    "sub": %"john",
-    "nbf": %1234,
-    "iat": %1234,
-    "exp": %1234,
-    "jti": %"token-id",
-    "foo": %{"bar": %1}
-  }
-  let claims = asJson.toClaims
-  let toJson = %claims
+    let asJson = %{
+      "iss": %"jane",
+      "sub": %"john",
+      "nbf": %1234,
+      "iat": %1234,
+      "exp": %1234,
+      "jti": %"token-id",
+      "foo": %{"bar": %1}
+    }
+    let claims = asJson.toClaims
+    let toJson = %claims
 
-  assert asJson.len == toJson.len
-  for k, v in asJson:
-    assert v == toJson[k]
+    assert asJson.len == toJson.len
+    for k, v in asJson:
+      assert v == toJson[k]
diff --git a/tests/t_jwt.nim b/tests/t_jwt.nim
index 19ee11e..b9083be 100644
--- a/tests/t_jwt.nim
+++ b/tests/t_jwt.nim
@@ -1,7 +1,7 @@
 import json, times, unittest
 from times import nil
 
-import jwt
+import ../jwt
 
 proc getToken(claims: JsonNode = newJObject(), header: JsonNode = newJObject()): JWT =
   let claims = claims.toClaims
@@ -32,14 +32,14 @@ suite "Token tests":
 
   test "NBF Check":
     let
-      now = getTime().toSeconds.int + 60
+      now = getTime().toUnix.int + 60
       token = getToken(claims = %{"nbf": %now})
     expect(InvalidToken):
       token.verifyTimeClaims
 
   test "EXP Check":
     let
-      now = getTime().toSeconds.int - 60
+      now = getTime().toUnix.int - 60
       token = getToken(claims = %{"exp": %now})
     expect(InvalidToken):
       token.verifyTimeClaims