diff --git a/examples/tutorial_builder/04_04_custom.rs b/examples/tutorial_builder/04_04_custom.rs
index 67cc6738..21e1e7d2 100644
--- a/examples/tutorial_builder/04_04_custom.rs
+++ b/examples/tutorial_builder/04_04_custom.rs
@@ -47,7 +47,7 @@ fn main() {
             _ => {
                 cmd.error(
                     ErrorKind::ArgumentConflict,
-                    "Cam only modify one version field",
+                    "Can only modify one version field",
                 )
                 .exit();
             }
diff --git a/examples/tutorial_builder/README.md b/examples/tutorial_builder/README.md
index 9798a242..5ad8cd38 100644
--- a/examples/tutorial_builder/README.md
+++ b/examples/tutorial_builder/README.md
@@ -605,7 +605,7 @@ OPTIONS:
 
 $ 04_04_custom
 ? failed
-error: Cam only modify one version field
+error: Can only modify one version field
 
 USAGE:
     04_04_custom[EXE] [OPTIONS] [INPUT_FILE]
@@ -617,7 +617,7 @@ Version: 2.2.3
 
 $ 04_04_custom --major --minor
 ? failed
-error: Cam only modify one version field
+error: Can only modify one version field
 
 USAGE:
     04_04_custom[EXE] [OPTIONS] [INPUT_FILE]
diff --git a/examples/tutorial_derive/04_04_custom.rs b/examples/tutorial_derive/04_04_custom.rs
index d42d22bd..a03345b8 100644
--- a/examples/tutorial_derive/04_04_custom.rs
+++ b/examples/tutorial_derive/04_04_custom.rs
@@ -60,7 +60,7 @@ fn main() {
                 let mut cmd = Cli::command();
                 cmd.error(
                     ErrorKind::ArgumentConflict,
-                    "Cam only modify one version field",
+                    "Can only modify one version field",
                 )
                 .exit();
             }
diff --git a/examples/tutorial_derive/README.md b/examples/tutorial_derive/README.md
index dc242bfc..70ca937e 100644
--- a/examples/tutorial_derive/README.md
+++ b/examples/tutorial_derive/README.md
@@ -577,7 +577,7 @@ OPTIONS:
 
 $ 04_04_custom_derive
 ? failed
-error: Cam only modify one version field
+error: Can only modify one version field
 
 USAGE:
     clap [OPTIONS] [INPUT_FILE]
@@ -589,7 +589,7 @@ Version: 2.2.3
 
 $ 04_04_custom_derive --major --minor
 ? failed
-error: Cam only modify one version field
+error: Can only modify one version field
 
 USAGE:
     clap [OPTIONS] [INPUT_FILE]