diff --git a/Gemfile.lock b/Gemfile.lock
index ea2148a..8953c06 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,7 +11,7 @@ GEM
     bindata (2.4.3)
     coderay (1.1.2)
     diff-lcs (1.3)
-    docile (1.1.5)
+    docile (1.3.0)
     json (2.1.0)
     method_source (0.9.0)
     parallel (1.12.1)
@@ -44,8 +44,8 @@ GEM
       ruby-progressbar (~> 1.7)
       unicode-display_width (~> 1.0, >= 1.0.1)
     ruby-progressbar (1.9.0)
-    simplecov (0.13.0)
-      docile (~> 1.1.0)
+    simplecov (0.16.1)
+      docile (~> 1.1)
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.2)
@@ -61,7 +61,7 @@ DEPENDENCIES
   rake (~> 12.1)
   rspec (~> 3.7)
   rubocop (~> 0.52)
-  simplecov (~> 0.13.0)
+  simplecov (~> 0.16.1)
   yard (~> 0.9)
 
 BUNDLED WITH
diff --git a/elftools.gemspec b/elftools.gemspec
index 3508ebc..0787a36 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', '~> 0.16.1'
   s.add_development_dependency 'yard', '~> 0.9'
 end