diff --git a/README.md b/README.md
index fb08752..f3b0389 100644
--- a/README.md
+++ b/README.md
@@ -116,6 +116,7 @@ RUN install-php-extensions gd xdebug
 | sysvmsg | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
 | sysvsem | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
 | sysvshm | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
+| tdlib |  |  |  |  |  | ✓ | ✓ |
 | tidy | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
 | timezonedb | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
 | uopz | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
@@ -127,7 +128,7 @@ RUN install-php-extensions gd xdebug
 | yaml | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
 | zip | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
 
-*Number of supported extensions: 77*
+*Number of supported extensions: 78*
 <!-- END OF EXTENSIONS TABLE -->
 
 PS: the pre-installed PHP extensions are excluded from this list.