diff --git a/Gemfile b/Gemfile
index 40a9577..a9f589d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,7 +6,7 @@ gemspec
 
 group :development, :test do
   gem "rake",              require: false
-  gem "rspec",   "~> 3.9", require: false
+  gem "rspec",   "~> 3.10", require: false
   gem "rubocop", "0.79.0", require: false
   gem "tjson",   "~> 0.5", require: false
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index 7aced0a..69c07df 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -8,26 +8,26 @@ GEM
   specs:
     ast (2.4.0)
     base32 (0.3.2)
-    diff-lcs (1.3)
+    diff-lcs (1.4.4)
     jaro_winkler (1.5.4)
     parallel (1.19.1)
     parser (2.7.0.1)
       ast (~> 2.4.0)
     rainbow (3.0.0)
     rake (13.0.1)
-    rspec (3.9.0)
-      rspec-core (~> 3.9.0)
-      rspec-expectations (~> 3.9.0)
-      rspec-mocks (~> 3.9.0)
-    rspec-core (3.9.0)
-      rspec-support (~> 3.9.0)
-    rspec-expectations (3.9.0)
+    rspec (3.10.0)
+      rspec-core (~> 3.10.0)
+      rspec-expectations (~> 3.10.0)
+      rspec-mocks (~> 3.10.0)
+    rspec-core (3.10.0)
+      rspec-support (~> 3.10.0)
+    rspec-expectations (3.10.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.9.0)
-    rspec-mocks (3.9.0)
+      rspec-support (~> 3.10.0)
+    rspec-mocks (3.10.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.9.0)
-    rspec-support (3.9.0)
+      rspec-support (~> 3.10.0)
+    rspec-support (3.10.0)
     rubocop (0.79.0)
       jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
@@ -47,7 +47,7 @@ DEPENDENCIES
   bundler (~> 2.0)
   cryptouri!
   rake
-  rspec (~> 3.9)
+  rspec (~> 3.10)
   rubocop (= 0.79.0)
   tjson (~> 0.5)