diff --git a/openproject-pdf_export.gemspec b/openproject-pdf_export.gemspec
index a206335083..622262bc62 100644
--- a/openproject-pdf_export.gemspec
+++ b/openproject-pdf_export.gemspec
@@ -17,7 +17,7 @@ Gem::Specification.new do |s|
 
   s.add_dependency 'rails', '~> 5.0.0'
 
-  s.add_dependency "prawn", "~> 2.2.0"
+  s.add_dependency "prawn", "~> 2.2"
 
   s.add_development_dependency "pdf-inspector", "~>1.0.0"
 end