diff --git a/blockchain/requirements.txt b/blockchain/requirements.txt
index 058119f..10b3f5e 100644
--- a/blockchain/requirements.txt
+++ b/blockchain/requirements.txt
@@ -17,7 +17,7 @@ pandas==1.3.5
 
 # Security dependencies
 cryptography==3.4.7
-pycryptodome==3.10.1
+pycryptodome==3.19.1
 
 # Testing dependencies
 pytest==6.2.4