diff --git a/docker/clamav/clamd.conf b/docker/clamav/clamd.conf
index 6b61e57f..ab005366 100644
--- a/docker/clamav/clamd.conf
+++ b/docker/clamav/clamd.conf
@@ -130,7 +130,7 @@ TCPAddr 0.0.0.0
 # Close the connection when the data size limit is exceeded.
 # The value should match your MTA's limit for a maximum attachment size.
 # Default: 25M
-StreamMaxLength 1024M
+StreamMaxLength 100M
 
 # Limit port range.
 # Default: 1024