diff --git a/Detour/Include/DetourAssert.h b/Detour/Include/DetourAssert.h
index e05fd66..038d538 100644
--- a/Detour/Include/DetourAssert.h
+++ b/Detour/Include/DetourAssert.h
@@ -24,7 +24,7 @@
 
 #ifdef NDEBUG
 
-// From http://cnicholson.net/2009/02/stupid-c-tricks-adventures-in-assert/
+// From https://web.archive.org/web/20210117002833/http://cnicholson.net/2009/02/stupid-c-tricks-adventures-in-assert/
 #	define dtAssert(x) do { (void)sizeof(x); } while((void)(__LINE__==-1),false)  
 
 #else
diff --git a/Recast/Include/RecastAssert.h b/Recast/Include/RecastAssert.h
index 617a4b7..81705bb 100644
--- a/Recast/Include/RecastAssert.h
+++ b/Recast/Include/RecastAssert.h
@@ -21,7 +21,7 @@
 
 #ifdef NDEBUG
 
-// From http://cnicholson.net/2009/02/stupid-c-tricks-adventures-in-assert/
+// From https://web.archive.org/web/20210117002833/http://cnicholson.net/2009/02/stupid-c-tricks-adventures-in-assert/
 #	define rcAssert(x) do { (void)sizeof(x); } while ((void)(__LINE__==-1), false)
 
 #else
diff --git a/Recast/Source/RecastMesh.cpp b/Recast/Source/RecastMesh.cpp
index 3b682df..c2c0d51 100644
--- a/Recast/Source/RecastMesh.cpp
+++ b/Recast/Source/RecastMesh.cpp
@@ -34,7 +34,7 @@ static bool buildMeshAdjacency(unsigned short* polys, const int npolys,
 							   const int nverts, const int vertsPerPoly)
 {
 	// Based on code by Eric Lengyel from:
-	// http://www.terathon.com/code/edges.php
+	// https://web.archive.org/web/20080704083314/http://www.terathon.com/code/edges.php
 	
 	int maxEdgeCount = npolys*vertsPerPoly;
 	unsigned short* firstEdge = (unsigned short*)rcAlloc(sizeof(unsigned short)*(nverts + maxEdgeCount), RC_ALLOC_TEMP);