diff --git a/lib/jwt.rb b/lib/jwt.rb
index 75435472..2fba2450 100644
--- a/lib/jwt.rb
+++ b/lib/jwt.rb
@@ -54,7 +54,7 @@ def decode(jwt, key = nil, verify = true, options = {}, &keyfinder) # rubocop:di
                        verify: verify,
                        keyfinder: keyfinder,
                        allowed_algorithms: normalizde_algorithm_option(options),
-                       **configuration.decode.to_h.merge(options)).decode_segments
+                       **configuration.decode.to_h.merge(options).transform_keys(&:to_sym)).decode_segments
   end
 
   # Order is very important - first check for string keys, next for symbols