diff --git a/external/stb/CMakeLists.txt b/external/stb/CMakeLists.txt
index dda4405..0e0b1cd 100644
--- a/external/stb/CMakeLists.txt
+++ b/external/stb/CMakeLists.txt
@@ -11,8 +11,9 @@ target_link_libraries(stb_image stb)
 add_library(stb_image_write "stb/stb_image_write.h" "stb_image_write.cpp")
 target_link_libraries(stb_image_write stb)
 
-add_library(stb_perlin "stb/stb_perlin.h" "stb_perlin.cpp")
-target_link_libraries(stb_perlin stb)
+# lel TODO: add back in when patent expires
+#add_library(stb_perlin "stb/stb_perlin.h" "stb_perlin.cpp")
+#target_link_libraries(stb_perlin stb)
 
 add_library(stb_rect_pack "stb/stb_rect_pack.h" "stb_rect_pack.cpp")
 target_link_libraries(stb_rect_pack stb)
diff --git a/external/stb/stb b/external/stb/stb
index 3a11740..af1a5bc 160000
--- a/external/stb/stb
+++ b/external/stb/stb
@@ -1 +1 @@
-Subproject commit 3a1174060a7dd4eb652d4e6854bc4cd98c159200
+Subproject commit af1a5bc352164740c1cc1354942b1c6b72eacb8a