--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@
 - `gojsonnet` - golang impl
 - `../../../../jsonnet-rs/target/release/jrsonnet` - this repo impl
 
-```md
+```markdown
 # Manifest 1 (plain values)
 
 Benchmark #1: gojsonnet 02-prepare.jsonnet -J ../vendor/
--- a/crates/jrsonnet-evaluator/README.md
+++ b/crates/jrsonnet-evaluator/README.md
@@ -22,7 +22,7 @@
 
 Can also be run via `cargo bench`
 
-```md
+```markdown
 # codegenerated-stdlib
 test tests::bench_codegen   ... bench:     401,696 ns/iter (+/- 38,521)
 # serialized-stdlib