diff --git a/leopard.nimble b/leopard.nimble
index 3f4b744..272b777 100644
--- a/leopard.nimble
+++ b/leopard.nimble
@@ -8,6 +8,5 @@ license       = "Apache License 2.0 or MIT"
 installDirs   = @["vendor"]
 
 requires "nim >= 1.6.0",
-         "stew",
-         "unittest2",
-         "upraises >= 0.1.0 & < 0.2.0"
+         "results",
+         "unittest2"
diff --git a/leopard/leopard.nim b/leopard/leopard.nim
index 5cc7390..b794398 100644
--- a/leopard/leopard.nim
+++ b/leopard/leopard.nim
@@ -7,12 +7,11 @@
 ## This file may not be copied, modified, or distributed except according to
 ## those terms.
 
-import pkg/upraises
-push: {.upraises: [].}
+{.push raises: [].}
 
 {.deadCodeElim: on.}
 
-import pkg/stew/results
+import pkg/results
 
 import ./wrapper
 import ./utils
diff --git a/leopard/utils/allocs.nim b/leopard/utils/allocs.nim
index 559b461..96eb36d 100644
--- a/leopard/utils/allocs.nim
+++ b/leopard/utils/allocs.nim
@@ -7,9 +7,7 @@
 ## This file may not be copied, modified, or distributed except according to
 ## those terms.
 
-import pkg/upraises
-push:
-  {.upraises: [].}
+{.push raises: [].}
 
 {.deadCodeElim: on.}
 
diff --git a/leopard/utils/cpuinfo_x86.nim b/leopard/utils/cpuinfo_x86.nim
index dc0add7..293d521 100644
--- a/leopard/utils/cpuinfo_x86.nim
+++ b/leopard/utils/cpuinfo_x86.nim
@@ -7,8 +7,7 @@
 ## This file may not be copied, modified, or distributed except according to
 ## those terms.
 
-import pkg/upraises
-push: {.upraises: [].}
+{.push raises: [].}
 
 {.deadCodeElim: on.}
 
diff --git a/leopard/wrapper.nim b/leopard/wrapper.nim
index c90eeb7..258b255 100644
--- a/leopard/wrapper.nim
+++ b/leopard/wrapper.nim
@@ -55,9 +55,7 @@
 ## arithmetic using Intel SIMD instructions."  In: FAST-2013: 11th Usenix
 ## Conference on File and Storage Technologies, San Jose, 2013
 
-import pkg/upraises
-push:
-  {.upraises: [].}
+{.push raises: [].}
 
 ## -----------------------------------------------------------------------------
 ## Build configuration
diff --git a/nimble.lock b/nimble.lock
index b079b94..4ff3320 100644
--- a/nimble.lock
+++ b/nimble.lock
@@ -1,35 +1,26 @@
 {
-  "version": 1,
+  "version": 2,
   "packages": {
+    "results": {
+      "version": "0.5.1",
+      "vcsRevision": "df8113dda4c2d74d460a8fa98252b0b771bf1f27",
+      "url": "https://github.com/arnetheduck/nim-results",
+      "downloadMethod": "git",
+      "dependencies": [],
+      "checksums": {
+        "sha1": "a9c011f74bc9ed5c91103917b9f382b12e82a9e7"
+      }
+    },
     "unittest2": {
-      "version": "0.0.4",
-      "vcsRevision": "f180f596c88dfd266f746ed6f8dbebce39c824db",
-      "url": "https://github.com/status-im/nim-unittest2.git",
+      "version": "0.2.4",
+      "vcsRevision": "8b51e99b4a57fcfb31689230e75595f024543024",
+      "url": "https://github.com/status-im/nim-unittest2",
       "downloadMethod": "git",
       "dependencies": [],
       "checksums": {
-        "sha1": "fa309c41eaf6ef57895b9e603f2620a2f6e11780"
-      }
-    },
-    "upraises": {
-      "version": "0.1.0",
-      "vcsRevision": "ff4f8108e44fba9b35cac535ab63d3927e8fd3c2",
-      "url": "https://github.com/markspanbroek/upraises.git",
-      "downloadMethod": "git",
-      "dependencies": [],
-      "checksums": {
-        "sha1": "a0243c8039e12d547dbb2e9c73789c16bb8bc956"
-      }
-    },
-    "stew": {
-      "version": "0.1.0",
-      "vcsRevision": "6ad35b876fb6ebe0dfee0f697af173acc47906ee",
-      "url": "https://github.com/status-im/nim-stew.git",
-      "downloadMethod": "git",
-      "dependencies": [],
-      "checksums": {
-        "sha1": "46d58c4feb457f3241e3347778334e325dce5268"
+        "sha1": "746106a4dfefffce497f1693733f1c1513b5c62c"
       }
     }
-  }
-}
\ No newline at end of file
+  },
+  "tasks": {}
+}
diff --git a/tests/helpers.nim b/tests/helpers.nim
index a9a11e6..e5a47f2 100644
--- a/tests/helpers.nim
+++ b/tests/helpers.nim
@@ -1,6 +1,6 @@
 import std/random
 
-import pkg/stew/results
+import pkg/results
 import ../leopard
 
 proc randomCRCPacket*(data: var openArray[byte]) =
diff --git a/tests/testleopard.nim b/tests/testleopard.nim
index 68894de..760706e 100644
--- a/tests/testleopard.nim
+++ b/tests/testleopard.nim
@@ -2,7 +2,7 @@ import std/random
 import std/sets
 
 import pkg/unittest2
-import pkg/stew/results
+import pkg/results
 
 import ../leopard
 import ./helpers