diff --git a/nostarch/chapter04.md b/nostarch/chapter04.md
index 16753d8..74e142b 100644
--- a/nostarch/chapter04.md
+++ b/nostarch/chapter04.md
@@ -580,7 +580,7 @@ fn change(some_string: &String) {
 
 Here’s the error:
 
-```text
+```bash
 error: cannot borrow immutable borrowed content `*some_string` as mutable
  --> error.rs:8:5
   |
@@ -622,7 +622,7 @@ let r2 = &mut s;
 
 Here’s the error:
 
-```text
+```bash
 error[E0499]: cannot borrow `s` as mutable more than once at a time
  --> borrow_twice.rs:5:19
   |
@@ -666,7 +666,7 @@ let r3 = &mut s; // BIG PROBLEM
 
 Here’s the error:
 
-```text
+```bash
 error[E0502]: cannot borrow `s` as mutable because it is also borrowed as immutable
  --> borrow_thrice.rs:6:19
   |
@@ -707,7 +707,7 @@ fn dangle() -> &String {
 
 Here’s the error:
 
-```text
+```bash
 error[E0106]: missing lifetime specifier
  --> dangle.rs:5:16
   |
@@ -725,7 +725,7 @@ This error message refers to a feature we haven’t learned about yet,
 ‘lifetimes’. The message does contain the key to why this code is a problem,
 though:
 
-```text
+```bash
 this function’s return type contains a borrowed value, but there is no value
 for it to be borrowed from
 ```
diff --git a/src/ch04-02-references-and-borrowing.md b/src/ch04-02-references-and-borrowing.md
index 6c0f3d8..d24226e 100644
--- a/src/ch04-02-references-and-borrowing.md
+++ b/src/ch04-02-references-and-borrowing.md
@@ -106,7 +106,7 @@ fn change(some_string: &String) {
 
 Here’s the error:
 
-```text
+```bash
 error: cannot borrow immutable borrowed content `*some_string` as mutable
  --> error.rs:8:5
   |
@@ -148,7 +148,7 @@ let r2 = &mut s;
 
 Here’s the error:
 
-```text
+```bash
 error[E0499]: cannot borrow `s` as mutable more than once at a time
  --> borrow_twice.rs:5:19
   |
@@ -192,7 +192,7 @@ let r3 = &mut s; // BIG PROBLEM
 
 Here’s the error:
 
-```text
+```bash
 error[E0502]: cannot borrow `s` as mutable because it is also borrowed as immutable
  --> borrow_thrice.rs:6:19
   |
@@ -233,7 +233,7 @@ fn dangle() -> &String {
 
 Here’s the error:
 
-```text
+```bash
 error[E0106]: missing lifetime specifier
  --> dangle.rs:5:16
   |
@@ -251,7 +251,7 @@ This error message refers to a feature we haven’t learned about yet,
 ‘lifetimes’. The message does contain the key to why this code is a problem,
 though:
 
-```text
+```bash
 this function’s return type contains a borrowed value, but there is no value
 for it to be borrowed from
 ```