diff --git a/README.md b/README.md
index 80efff9..f228dac 100644
--- a/README.md
+++ b/README.md
@@ -22,11 +22,12 @@ library    | lastest version | category | LoC | description
 --------------------- | ---- | -------- | --- | --------------------------------
 **[stb_vorbis.c](stb_vorbis.c)** | 1.22 | audio | 5584 | decode ogg vorbis files from file/memory to float/16-bit signed output
 **[stb_hexwave.h](stb_hexwave.h)** | 0.5 | audio | 680 | audio waveform synthesizer
-**[stb_image.h](stb_image.h)** | 2.28 | graphics | 7986 | image loading/decoding from file/memory: JPG, PNG, TGA, BMP, PSD, GIF, HDR, PIC
+**[stb_image.h](stb_image.h)** | 2.28 | graphics | 7987 | image loading/decoding from file/memory: JPG, PNG, TGA, BMP, PSD, GIF, HDR, PIC
 **[stb_truetype.h](stb_truetype.h)** | 1.26 | graphics | 5077 | parse, decode, and rasterize characters from truetype fonts
 **[stb_image_write.h](stb_image_write.h)** | 1.16 | graphics | 1724 | image writing to disk: PNG, TGA, BMP
 **[stb_image_resize.h](stb_image_resize.h)** | 0.97 | graphics | 2634 | resize images larger/smaller with good quality
 **[stb_rect_pack.h](stb_rect_pack.h)** | 1.01 | graphics | 623 | simple 2D rectangle packer with decent quality
+**[stb_perlin.h](stb_perlin.h)** | 0.5 | graphics | 428 | perlin's revised simplex noise w/ different seeds
 **[stb_ds.h](stb_ds.h)** | 0.67 | utility | 1895 | typesafe dynamic array and hash tables for C, will compile in C++
 **[stb_sprintf.h](stb_sprintf.h)** | 1.10 | utility | 1906 | fast sprintf, snprintf for C/C++
 **[stb_textedit.h](stb_textedit.h)** | 1.14 | user interface | 1429 | guts of a text editor for games etc implementing them from scratch
@@ -41,8 +42,8 @@ library    | lastest version | category | LoC | description
 **[stb_leakcheck.h](stb_leakcheck.h)** | 0.6 | misc | 194 | quick-and-dirty malloc/free leak-checking
 **[stb_include.h](stb_include.h)** | 0.02 | misc | 295 | implement recursive #include support, particularly for GLSL
 
-Total libraries: 20
-Total lines of C code: 42688
+Total libraries: 21
+Total lines of C code: 43117
 
 
 FAQ
diff --git a/tools/README.list b/tools/README.list
index 6d9764b..294bf87 100644
--- a/tools/README.list
+++ b/tools/README.list
@@ -5,6 +5,7 @@ stb_truetype.h              | graphics         | parse, decode, and rasterize ch
 stb_image_write.h           | graphics         | image writing to disk: PNG, TGA, BMP
 stb_image_resize.h          | graphics         | resize images larger/smaller with good quality
 stb_rect_pack.h             | graphics         | simple 2D rectangle packer with decent quality
+stb_perlin.h                | graphics         | perlin's revised simplex noise w/ different seeds
 stb_ds.h                    | utility          | typesafe dynamic array and hash tables for C, will compile in C++
 stb_sprintf.h               | utility          | fast sprintf, snprintf for C/C++
 stb_textedit.h              | user interface   | guts of a text editor for games etc implementing them from scratch