diff --git a/src/index.js b/src/index.js
index cf72237..7f5bd69 100644
--- a/src/index.js
+++ b/src/index.js
@@ -5,7 +5,7 @@ import {debug, endGroup, getInput, info, setFailed, startGroup} from "@actions/c
 import {context, getOctokit} from "@actions/github"
 import detectIndent from "detect-indent"
 import purdy from "purdy"
-import readFileString from "read-file-string"
+import readFileString from "./lib/esm/read-file-string.js"
 
 import chalk from "./lib/chalk.js"
 import DescriptionProperty from "./lib/DescriptionProperty.js"
diff --git a/src/lib/esm/read-file-string.js b/src/lib/esm/read-file-string.js
new file mode 100644
index 0000000..9fe1ebc
--- /dev/null
+++ b/src/lib/esm/read-file-string.js
@@ -0,0 +1,3 @@
+import commonJsModule from "read-file-string"
+
+export default commonJsModule.default
\ No newline at end of file