diff --git a/packages/mermaid/src/themes/theme-neo-dark.js b/packages/mermaid/src/themes/theme-neo-dark.js
index c9a5ef420..9eaa42fef 100644
--- a/packages/mermaid/src/themes/theme-neo-dark.js
+++ b/packages/mermaid/src/themes/theme-neo-dark.js
@@ -52,7 +52,7 @@ class Theme {
     this.useGradient = true;
     this.gradientStart = '#0042eb';
     this.gradientStop = '#eb0042';
-    this.dropShadow = 'drop-shadow( 1px 2px 2px rgba(185,185,185,0.5))';
+    this.dropShadow = 'drop-shadow( 1px 2px 2px rgba(185,185,185,0.2))';
 
     /* Architecture Diagram variables */
     this.archEdgeColor = 'calculated';