diff --git a/dsl/eplt-grammar.ebnf b/dsl/pdsl-grammar.ebnf
similarity index 100%
rename from dsl/eplt-grammar.ebnf
rename to dsl/pdsl-grammar.ebnf
diff --git a/dsl/src/diag.rs b/dsl/src/diag.rs
index c1a9a4a..7e4cf66 100644
--- a/dsl/src/diag.rs
+++ b/dsl/src/diag.rs
@@ -85,7 +85,7 @@ impl miette::SourceCode for Source {
                 content.column(),
                 content.line_count(),
             )
-            .with_language("edsl");
+            .with_language("pdsl");
             Ok(Box::new(content))
         } else {
             Ok(content)