diff --git a/codemods/babel-plugin-codemod-object-assign-to-object-spread/README.md b/codemods/babel-plugin-codemod-object-assign-to-object-spread/README.md
index d33028bcad..d0f4a1d848 100644
--- a/codemods/babel-plugin-codemod-object-assign-to-object-spread/README.md
+++ b/codemods/babel-plugin-codemod-object-assign-to-object-spread/README.md
@@ -36,7 +36,7 @@ npm install --save-dev @babel/plugin-codemod-object-assign-to-object-spread
 
 **.babelrc**
 
-```json
+```jsonc
 {
   "plugins": ["@babel/plugin-codemod-object-assign-to-object-spread"]
 }
diff --git a/codemods/babel-plugin-codemod-optional-catch-binding/README.md b/codemods/babel-plugin-codemod-optional-catch-binding/README.md
index 6ba95eb9f4..c462156016 100644
--- a/codemods/babel-plugin-codemod-optional-catch-binding/README.md
+++ b/codemods/babel-plugin-codemod-optional-catch-binding/README.md
@@ -34,7 +34,7 @@ npm install --save-dev @babel/plugin-codemod-optional-catch-binding
 
 **.babelrc**
 
-```json
+```jsonc
 {
   "plugins": ["@babel/plugin-codemod-optional-catch-binding"]
 }
diff --git a/packages/babel-preset-stage-0/README.md b/packages/babel-preset-stage-0/README.md
index 18884ec96d..e4cdd326b0 100644
--- a/packages/babel-preset-stage-0/README.md
+++ b/packages/babel-preset-stage-0/README.md
@@ -8,7 +8,7 @@ For a more automatic migration, we have updated [babel-upgrade](https://github.c
 
 If you want the same configuration as before:
 
-```json
+```jsonc
 {
   "plugins": [
     // Stage 0
diff --git a/packages/babel-preset-stage-1/README.md b/packages/babel-preset-stage-1/README.md
index 3c4c61d508..6cd8f47500 100644
--- a/packages/babel-preset-stage-1/README.md
+++ b/packages/babel-preset-stage-1/README.md
@@ -8,7 +8,7 @@ For a more automatic migration, we have updated [babel-upgrade](https://github.c
 
 If you want the same configuration as before:
 
-```json
+```jsonc
 {
   "plugins": [
     // Stage 1
diff --git a/packages/babel-preset-stage-2/README.md b/packages/babel-preset-stage-2/README.md
index ecbde7ab55..f1f9abfebf 100644
--- a/packages/babel-preset-stage-2/README.md
+++ b/packages/babel-preset-stage-2/README.md
@@ -8,7 +8,7 @@ For a more automatic migration, we have updated [babel-upgrade](https://github.c
 
 If you want the same configuration as before:
 
-```json
+```jsonc
 {
   "plugins": [
     // Stage 2