diff --git a/requirements.txt b/requirements.txt
index 842797a..78a004c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ urllib3>=1.25.11
 xxhash>=1.3.0
 pytest>=6.1.1
 
-polymath-scalecodec==0.6.1a2
+polymath-scalecodec==0.6.1a3
 py-sr25519-bindings>=0.1.2
 py-ed25519-bindings>=0.1.1
 py-bip39-bindings>=0.1.6
diff --git a/setup.py b/setup.py
index 1ddd665..35502b8 100644
--- a/setup.py
+++ b/setup.py
@@ -183,7 +183,7 @@
         'requests>=2.24.0',
         'urllib3>=1.25.10',
         'xxhash>=1.3.0',
-        'polymath-scalecodec==0.6.1a2',
+        'polymath-scalecodec==0.6.1a3',
         'py-sr25519-bindings>=0.1.2',
         'py-ed25519-bindings>=0.1.1',
         'py-bip39-bindings>=0.1.6'