diff --git a/README.md b/README.md
index 796180a1f0d4886c676203e0eca23c801f7e7938..7fe0b536bafb930c7853c161735ddf8381f225f9 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ It appeared that sliders are not suitable for the range of discretisation step,
 
 | Code with sliders for K and delta_h | Code with sliders for K and TextBox for delta_h  |
 | ------ | ------ |
-| ![screenshot](/screenshots/Subcritical_backwater.PNG) | ![screenshot](/screenshots/BackwaterDemoTextBox_impossible.PNG) |
-| <i> K such as computation is possible </i> | <i> K such as computation is _impossible (hn < hc) _ </i>  |
+| ![screenshot](/screenshots/Subcritical_backwater.PNG) | ![screenshot](/screenshots/BackwaterDemoTextBox_impossible.png) |
+| <i> K such as computation is possible </i> | <i> K such as computation is _impossible (hn < hc)_ </i>  |