diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5c9e540..11ba4e7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,13 +8,13 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macOS-latest, windows-latest]
-        nim: [stable, 1.2.6]
+        nim: [stable, 2.0.14]
     steps:
     - uses: actions/checkout@v2
     - uses: iffy/install-nim@v3
       with:
         version: ${{ matrix.nim }}
     - name: Build
-      run: nimble install -y
+      run: nimble install -y --maximumtaggedversions=2
     - name: Test
       run: nimble test -y
diff --git a/Readme.md b/Readme.md
index 6df93d2..87774e4 100644
--- a/Readme.md
+++ b/Readme.md
@@ -10,3 +10,11 @@ References
   - [statechannels.org](https://statechannels.org/)
   - [Nitro paper](https://magmo.com/nitro-protocol.pdf)
   - [Nitro smart contracts & Javascript code](https://github.com/statechannels/statechannels/tree/master/packages/nitro-protocol)
+
+# Installation
+
+To avoid conflicts with previous versions of `contractabi`, use the following command to install dependencies:
+
+```bash
+nimble install --maximumtaggedversions=2
+```
\ No newline at end of file
diff --git a/nimble.lock b/nimble.lock
index b837775..6090a9f 100644
--- a/nimble.lock
+++ b/nimble.lock
@@ -1,74 +1,85 @@
 {
-  "version": 1,
+  "version": 2,
   "packages": {
-    "upraises": {
-      "version": "0.1.0",
-      "vcsRevision": "ff4f8108e44fba9b35cac535ab63d3927e8fd3c2",
-      "url": "https://github.com/markspanbroek/upraises.git",
+    "results": {
+      "version": "0.5.1",
+      "vcsRevision": "df8113dda4c2d74d460a8fa98252b0b771bf1f27",
+      "url": "https://github.com/arnetheduck/nim-results",
       "downloadMethod": "git",
       "dependencies": [],
       "checksums": {
-        "sha1": "a0243c8039e12d547dbb2e9c73789c16bb8bc956"
+        "sha1": "a9c011f74bc9ed5c91103917b9f382b12e82a9e7"
+      }
+    },
+    "unittest2": {
+      "version": "0.2.3",
+      "vcsRevision": "845b6af28b9f68f02d320e03ad18eccccea7ddb9",
+      "url": "https://github.com/status-im/nim-unittest2",
+      "downloadMethod": "git",
+      "dependencies": [],
+      "checksums": {
+        "sha1": "6936b4e4676c9b37537d93f31cb8fc46f4ebaacb"
       }
     },
     "stew": {
-      "version": "0.1.0",
-      "vcsRevision": "6ad35b876fb6ebe0dfee0f697af173acc47906ee",
-      "url": "https://github.com/status-im/nim-stew.git",
+      "version": "0.2.0",
+      "vcsRevision": "79e4fa5a9d3374db17ed63622714d3e1094c7f34",
+      "url": "https://github.com/status-im/nim-stew",
       "downloadMethod": "git",
-      "dependencies": [],
+      "dependencies": [
+        "results",
+        "unittest2"
+      ],
       "checksums": {
-        "sha1": "46d58c4feb457f3241e3347778334e325dce5268"
+        "sha1": "26d477c735913b7daa1dab53dd74803c88209634"
+      }
+    },
+    "stint": {
+      "version": "0.8.1",
+      "vcsRevision": "1a2c661e3f50ff696b0b6692fab0d7bb2abf10cc",
+      "url": "https://github.com/status-im/nim-stint",
+      "downloadMethod": "git",
+      "dependencies": [
+        "stew",
+        "unittest2"
+      ],
+      "checksums": {
+        "sha1": "fe3c8b7b0484135294b8fb3dab5b1a030a08bddc"
       }
     },
     "nimcrypto": {
-      "version": "0.5.4",
-      "vcsRevision": "a5742a9a214ac33f91615f3862c7b099aec43b00",
+      "version": "0.6.2",
+      "vcsRevision": "dc07e3058c6904eef965394493b6ea99aa2adefc",
       "url": "https://github.com/cheatfate/nimcrypto",
       "downloadMethod": "git",
       "dependencies": [],
       "checksums": {
-        "sha1": "f76c87707cd4e96355b8bb6ef27e7f8b0aac1e08"
-      }
-    },
-    "secp256k1": {
-      "version": "0.5.2",
-      "vcsRevision": "5340cf188168d6afcafc8023770d880f067c0b2f",
-      "url": "https://github.com/status-im/nim-secp256k1.git",
-      "downloadMethod": "git",
-      "dependencies": [
-        "stew",
-        "nimcrypto"
-      ],
-      "checksums": {
-        "sha1": "ae9cbea4487be94a06653ffee075a7f1bd1e231e"
+        "sha1": "8e3e42530f54c8c312942a89640b7e0f687f33a5"
       }
     },
     "questionable": {
-      "version": "0.10.2",
-      "vcsRevision": "6018fd43e033d5a5310faa45bcaa1b44049469a4",
-      "url": "https://github.com/status-im/questionable.git",
+      "version": "0.10.15",
+      "vcsRevision": "82d90b67bcfb7f2e918b61dace2ff1a4ced60935",
+      "url": "https://github.com/markspanbroek/questionable",
       "downloadMethod": "git",
       "dependencies": [],
       "checksums": {
-        "sha1": "36a6c012637c7736a390e74a7f94667bca562073"
+        "sha1": "3238ff637c7b44d2fa8fcb839a8ded968e389de3"
       }
     },
-    "stint": {
-      "version": "0.0.1",
-      "vcsRevision": "036c71d06a6b22f8f967ba9d54afd2189c3872ca",
-      "url": "https://github.com/status-im/stint.git",
+    "upraises": {
+      "version": "0.1.0",
+      "vcsRevision": "d9f268db1021959fe0f2c7a5e49fba741f9932a0",
+      "url": "https://github.com/markspanbroek/upraises",
       "downloadMethod": "git",
-      "dependencies": [
-        "stew"
-      ],
+      "dependencies": [],
       "checksums": {
-        "sha1": "0f187a2115315ca898e5f9a30c5e506cf6057062"
+        "sha1": "176234f808b44a0be763df706ed634d6e8df17bb"
       }
     },
     "contractabi": {
-      "version": "0.4.5",
-      "vcsRevision": "df55276f1d7bed529cf8d423a5077ca8a2a2d4ca",
+      "version": "0.7.1",
+      "vcsRevision": "524bda044baecdf1ead4f179bdad2b8706ae3a5a",
       "url": "https://github.com/status-im/nim-contract-abi",
       "downloadMethod": "git",
       "dependencies": [
@@ -79,8 +90,22 @@
         "upraises"
       ],
       "checksums": {
-        "sha1": "11387226c5e355e207f587382e3bcca1cc5cf687"
+        "sha1": "c45b2abde354c731ed9cb3bf30a8fe0a444ed027"
+      }
+    },
+    "secp256k1": {
+      "version": "0.6.0.3.2",
+      "vcsRevision": "62e16b4dff513f1eea7148a8cbba8a8c547b9546",
+      "url": "https://github.com/status-im/nim-secp256k1",
+      "downloadMethod": "git",
+      "dependencies": [
+        "stew",
+        "nimcrypto"
+      ],
+      "checksums": {
+        "sha1": "443802551ed2f7ba273df38e06a18164dffa14c9"
       }
     }
-  }
-}
\ No newline at end of file
+  },
+  "tasks": {}
+}
diff --git a/nitro.nimble b/nitro.nimble
index abf31fe..b674233 100644
--- a/nitro.nimble
+++ b/nitro.nimble
@@ -1,13 +1,13 @@
-version = "0.5.1"
+version = "0.6.0"
 author = "Nim Nitro developers"
 license = "MIT"
 description = "Nitro state channels"
 
-requires "nim >= 1.2.6 & < 2.0.0"
-requires "nimcrypto >= 0.5.4 & < 0.6.0"
-requires "questionable >= 0.10.1 & < 0.11.0"
+requires "nim >= 2.0.14 & < 3.0.0"
+requires "nimcrypto >= 0.6.0 & < 0.7.0"
+requires "questionable >= 0.10.10 & < 0.11.0"
 requires "upraises >= 0.1.0 & < 0.2.0"
-requires "contractabi >= 0.4.1 & < 0.5.0"
-requires "secp256k1"
-requires "stint"
-requires "stew"
+requires "contractabi >= 0.7.1 & < 0.8.0"
+requires "secp256k1 >= 0.6.0 & < 0.7.0"
+requires "stint >= 0.8.0 & < 0.9.0"
+requires "stew >= 0.2.0 & < 0.3.0"
\ No newline at end of file
diff --git a/tests/nitro/examples.nim b/tests/nitro/examples.nim
index 4453900..b7e099b 100644
--- a/tests/nitro/examples.nim
+++ b/tests/nitro/examples.nim
@@ -19,10 +19,10 @@ proc example*[T](_: type seq[T], len = 0..5): seq[T] =
   newSeqWith(chosenlen, T.example)
 
 proc example*(_: type UInt256): UInt256 =
-  UInt256.fromBytes(array[32, byte].example)
+  UInt256.fromBytesBE(array[32, byte].example)
 
 proc example*(_: type UInt128): UInt128 =
-  UInt128.fromBytes(array[16, byte].example)
+  UInt128.fromBytesBE(array[16, byte].example)
 
 proc example*(_: type EthAddress): EthAddress =
   EthAddress(array[20, byte].example)