diff --git a/docs/generating_the_url_advanced.md b/docs/generating_the_url_advanced.md
index 7a4def6e..bf7eb58a 100644
--- a/docs/generating_the_url_advanced.md
+++ b/docs/generating_the_url_advanced.md
@@ -320,7 +320,7 @@ When using encoded source URL, you can specify the [extension](#extension) after
 
 ### Extension
 
-Extension specifies the format of the resulting image. At the moment, imgproxy supports only `jpg`, `png`, `webp`, `gif`, and `ico`, them being the most popular and useful image formats on the Web.
+Extension specifies the format of the resulting image. At the moment, imgproxy supports only `jpg`, `png`, `webp`, `gif`, `ico`, `heic`, and `tiff`, them being the most popular and useful image formats.
 
 **Note:** Read about GIF support [here](image_formats_support.md#gif-support).
 
diff --git a/docs/generating_the_url_basic.md b/docs/generating_the_url_basic.md
index f48393a0..d3794d0f 100644
--- a/docs/generating_the_url_basic.md
+++ b/docs/generating_the_url_basic.md
@@ -87,7 +87,7 @@ When using encoded source URL, you can specify the [extension](#extension) after
 
 ### Extension
 
-Extension specifies the format of the resulting image. At the moment, imgproxy supports only `jpg`, `png`, `webp`, `gif`, and `ico`, them being the most popular and useful image formats on the Web.
+Extension specifies the format of the resulting image. At the moment, imgproxy supports only `jpg`, `png`, `webp`, `gif`, `ico`, `heic`, and `tiff`, them being the most popular and useful image formats.
 
 **Note:** Read about GIF support [here](image_formats_support.md#gif-support).
 
diff --git a/docs/image_formats_support.md b/docs/image_formats_support.md
index 3b6859c5..1dafbb1c 100644
--- a/docs/image_formats_support.md
+++ b/docs/image_formats_support.md
@@ -1,6 +1,6 @@
 # Image formats support
 
-At the moment, imgproxy supports only the most popular Web image formats:
+At the moment, imgproxy supports only the most popular image formats:
 
 * PNG;
 * JPEG;
@@ -8,7 +8,8 @@ At the moment, imgproxy supports only the most popular Web image formats:
 * GIF;
 * ICO;
 * SVG _(source only)_;
-* HEIC.
+* HEIC;
+* TIFF.
 
 ## GIF support