diff --git a/src/sqlite3/connection.cr b/src/sqlite3/connection.cr
index 756ec49..5079c3c 100644
--- a/src/sqlite3/connection.cr
+++ b/src/sqlite3/connection.cr
@@ -9,7 +9,11 @@ class SQLite3::Connection < DB::Connection
   end
 
   def self.filename(uri : URI)
-    URI.unescape((uri.host || "") + uri.path)
+    {% if compare_versions(Crystal::VERSION, "0.30.0-0") >= 0 %}
+      URI.decode_www_form((uri.host || "") + uri.path)
+    {% else %}
+      URI.unescape((uri.host || "") + uri.path)
+    {% end %}
   end
 
   def build_prepared_statement(query) : Statement