diff --git a/README.md b/README.md
index 0f27dde..6d7ca90 100644
--- a/README.md
+++ b/README.md
@@ -48,7 +48,7 @@ You can also contribute.
 ## Mind Maps for Bug Hunters
 * [SSRF](mindmaps-pdf/SSRF.pdf)
 * [XXE](mindmaps-pdf/XXE.pdf)
-* [Prototype Pollution](mindmaps-pdf/Prototype Pollution.pdf)
+* [Prototype Pollution](mindmaps-pdf/Prototype%20Pollution.pdf)
 
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 *All content of this repository will always be updated...*