diff --git a/.clippy.toml b/.clippy.toml
index 90bfd5f..f97e544 100644
--- a/.clippy.toml
+++ b/.clippy.toml
@@ -1 +1 @@
-msrv = "1.45.0"
+msrv = "1.42.0"
diff --git a/README.md b/README.md
index 75c47da..acd16fa 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ time so the leftmost non-space character is in the first column.
 indoc = "1.0"
 ```
 
-*Compiler requirement: rustc 1.45 or greater.*
+*Compiler requirement: rustc 1.42 or greater.*
 
 <br>