diff --git a/Gemfile b/Gemfile
index 427bd1a..d8cefd0 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,6 +3,6 @@ gemspec
 
 group :test, :development do
   gem "rake"
-  gem "rspec", "~> 3.11"
+  gem "rspec", "~> 3.12"
   gem "standard"
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index a74d05d..dc8704d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -15,19 +15,19 @@ GEM
     rake (13.0.6)
     regexp_parser (2.1.1)
     rexml (3.2.5)
-    rspec (3.11.0)
-      rspec-core (~> 3.11.0)
-      rspec-expectations (~> 3.11.0)
-      rspec-mocks (~> 3.11.0)
-    rspec-core (3.11.0)
-      rspec-support (~> 3.11.0)
-    rspec-expectations (3.11.0)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-core (3.12.0)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.11.0)
-    rspec-mocks (3.11.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.11.0)
-    rspec-support (3.11.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.0)
     rubocop (1.12.1)
       parallel (~> 1.10)
       parser (>= 3.0.0.0)
@@ -53,7 +53,7 @@ PLATFORMS
 
 DEPENDENCIES
   rake
-  rspec (~> 3.11)
+  rspec (~> 3.12)
   standard
   substance_operation!