diff --git a/README.md b/README.md
index d9369ef..b57a024 100644
--- a/README.md
+++ b/README.md
@@ -103,7 +103,7 @@ If you choose to do this, please check the ADC voltage level of your ESP8266 boa
 
 Example with a NodeMCU board:
 
-![brightness.png][brightness.png]
+![brightness.png](brightness.png)
 
 You can use the values `ADC_MAX`, `ADC_MIN`, `BRIGHT_MIN` and `BRIGHT_MAX` at the top of the file `esp/src/main.cpp` to fine-tune the sensitivity and thresholds of the auto adjustment.