diff --git a/image_optim.gemspec b/image_optim.gemspec
index bb20c195..ef87638d 100644
--- a/image_optim.gemspec
+++ b/image_optim.gemspec
@@ -29,7 +29,7 @@ EOF
 
   s.add_dependency 'fspath', '~> 3.0'
   s.add_dependency 'image_size', '>= 1.5', '< 4'
-  s.add_dependency 'exifr', '~> 1.2', '>= 1.2.2'
+  s.add_dependency 'exifr', '1.4.0'
   s.add_dependency 'progress', '~> 3.0', '>= 3.0.1'
   s.add_dependency 'in_threads', '~> 1.3'