diff --git a/Gemfile.lock b/Gemfile.lock
index 8fb2d51..a6878c2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -44,7 +44,7 @@ GEM
       ruby-progressbar (~> 1.7)
       unicode-display_width (~> 1.0, >= 1.0.1)
     ruby-progressbar (1.9.0)
-    simplecov (0.13.0)
+    simplecov (0.15.1)
       docile (~> 1.1.0)
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
@@ -61,7 +61,7 @@ DEPENDENCIES
   rake (~> 12.1)
   rspec (~> 3.7)
   rubocop (~> 0.52)
-  simplecov (~> 0.13.0)
+  simplecov (~> 0.15.1)
   yard (~> 0.9)
 
 BUNDLED WITH
diff --git a/elftools.gemspec b/elftools.gemspec
index 3508ebc..d1108bc 100644
--- a/elftools.gemspec
+++ b/elftools.gemspec
@@ -25,6 +25,6 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'rake', '~> 12.1'
   s.add_development_dependency 'rspec', '~> 3.7'
   s.add_development_dependency 'rubocop', '~> 0.52'
-  s.add_development_dependency 'simplecov', '~> 0.13.0'
+  s.add_development_dependency 'simplecov', '~> 0.15.1'
   s.add_development_dependency 'yard', '~> 0.9'
 end