diff --git a/README-tmpl.md b/README-tmpl.md
index 8b6bafd..e86fd4d 100644
--- a/README-tmpl.md
+++ b/README-tmpl.md
@@ -60,10 +60,10 @@ You can easily test the library using the free [waver](https://github.com/ggerga
 
   ```bash
   # audible example
-  curl -sS 'https://ggwave-to-file.ggerganov.com/?m=Hello world!' --output hello.wav
+  curl -sS 'https://ggwave-to-file.ggerganov.com/?m=Hello%20world!' --output hello.wav
 
   # ultrasound example
-  curl -sS 'https://ggwave-to-file.ggerganov.com/?m=Hello world!&p=4' --output hello.wav
+  curl -sS 'https://ggwave-to-file.ggerganov.com/?m=Hello%20world!&p=4' --output hello.wav
   ```
 
 
diff --git a/README.md b/README.md
index d930466..fc3d443 100644
--- a/README.md
+++ b/README.md
@@ -61,10 +61,10 @@ You can easily test the library using the free [waver](https://github.com/ggerga
 
   ```bash
   # audible example
-  curl -sS 'https://ggwave-to-file.ggerganov.com/?m=Hello world!' --output hello.wav
+  curl -sS 'https://ggwave-to-file.ggerganov.com/?m=Hello%20world!' --output hello.wav
 
   # ultrasound example
-  curl -sS 'https://ggwave-to-file.ggerganov.com/?m=Hello world!&p=4' --output hello.wav
+  curl -sS 'https://ggwave-to-file.ggerganov.com/?m=Hello%20world!&p=4' --output hello.wav
   ```
 
 
diff --git a/examples/ggwave-to-file/README.md b/examples/ggwave-to-file/README.md
index 4f2ed01..0277df1 100644
--- a/examples/ggwave-to-file/README.md
+++ b/examples/ggwave-to-file/README.md
@@ -75,10 +75,10 @@ You can use it to query audio waveforms by specifying the text message as a GET
 
 ```bash
 # audible example
-curl -sS 'https://ggwave-to-file.ggerganov.com/?m=Hello world!' --output hello.wav
+curl -sS 'https://ggwave-to-file.ggerganov.com/?m=Hello%20world!' --output hello.wav
 
 # ultrasound example
-curl -sS 'https://ggwave-to-file.ggerganov.com/?m=Hello world!&p=4' --output hello.wav
+curl -sS 'https://ggwave-to-file.ggerganov.com/?m=Hello%20world!&p=4' --output hello.wav
 ```
 
 ### browser