diff --git a/.travis.yml b/.travis.yml
index d12523885..26d93a7d8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,8 @@ php:
   - 7.1
   - 7.2
   - 7.3
+  - 8.0
+  - 8.1
 
 env:
   - PHPUNIT=true PHPUNIT_EXT=true BITCOIN_VERSION="0.16.3" SECP256K1_COMMIT="cd329dbc3eaf096ae007e807b86b6f5947621ee3"
diff --git a/composer.json b/composer.json
index 41193ac70..973fbbcec 100644
--- a/composer.json
+++ b/composer.json
@@ -26,7 +26,7 @@
     "php-64bit": ">=7.0",
     "pleonasm/merkle-tree": "1.0.0",
     "composer/semver": "^1.4.0|^3.2.0",
-    "lastguest/murmurhash": "v2.0.0",
+    "lastguest/murmurhash": "v2.1.1",
     "mdanter/ecc": "^0.5.0",
     "bitwasp/buffertools": "^0.5.0",
     "bitwasp/bech32": "^0.0.1"