diff --git a/Gemfile b/Gemfile
index 094d8d5..fdbf849 100644
--- a/Gemfile
+++ b/Gemfile
@@ -58,3 +58,4 @@ end
 gem 'tzinfo-data', platforms: %i[mingw mswin x64_mingw jruby]
 
 gem 'carrierwave'
+gem 'parser', '< 2.7.2.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index e216dbd..d40d2e2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -114,7 +114,7 @@ GEM
     nokogiri (1.10.10)
       mini_portile2 (~> 2.4.0)
     parallel (1.20.0)
-    parser (2.7.2.0)
+    parser (2.7.1.5)
       ast (~> 2.4.1)
     public_suffix (4.0.6)
     puma (4.3.6)
@@ -246,6 +246,7 @@ DEPENDENCIES
   carrierwave
   jbuilder (~> 2.7)
   listen (~> 3.2)
+  parser (< 2.7.2.0)
   puma (~> 4.1)
   rails (~> 6.0.3, >= 6.0.3.4)
   rubocop-fjord