diff --git a/d2/plugin.py b/d2/plugin.py
index 0e4b697..8a00565 100644
--- a/d2/plugin.py
+++ b/d2/plugin.py
@@ -51,12 +51,14 @@ def on_config(self, config: MkDocsConfig) -> Optional[MkDocsConfig]:
             raise ConfigurationError(f"executable '{self.config.executable}' not found")
         raw_version = result.stdout.decode().strip()
         raw_version = raw_version.split("-")[0]  # remove git commit info
-        d2_version = version.parse(raw_version)
-        if d2_version < REQUIRED_VERSION:
-            warning(
-                f"required d2 version {REQUIRED_VERSION} not satisfied "
-                "or version format not recognized; found {d2_version}"
-            )
+        try:
+            d2_version = version.parse(raw_version)
+            if d2_version < REQUIRED_VERSION:
+                warning(
+                    f"required d2 version {REQUIRED_VERSION} not satisfied; found {d2_version}"
+                )
+        except version.InvalidVersion:
+            warning(f"version format not recognized; found {raw_version}")
 
         renderer = partial(render, self.config.executable, self.cache)  # type: ignore