diff --git a/Gemfile.lock b/Gemfile.lock
index e73e87a..5291bfa 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    opsgenie-schedule (0.1.4)
+    opsgenie-schedule (0.1.6)
       httparty (~> 0.17)
 
 GEM
@@ -16,7 +16,7 @@ GEM
       bigdecimal
       rexml
     diff-lcs (1.5.1)
-    dotenv (2.8.1)
+    dotenv (3.1.4)
     hashdiff (1.1.1)
     httparty (0.21.0)
       mini_mime (>= 1.0.0)
@@ -79,7 +79,7 @@ PLATFORMS
 
 DEPENDENCIES
   bundler (~> 2.0)
-  dotenv (~> 2.7)
+  dotenv (~> 3.1)
   opsgenie-schedule!
   pry (~> 0.14.0)
   rake (~> 12.3.3)
diff --git a/opsgenie-schedule.gemspec b/opsgenie-schedule.gemspec
index b674f51..de33714 100644
--- a/opsgenie-schedule.gemspec
+++ b/opsgenie-schedule.gemspec
@@ -26,7 +26,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "rspec", "~> 3.0"
   spec.add_development_dependency "standard", "~> 0.1"
   spec.add_development_dependency "webmock", "~> 3.5"
-  spec.add_development_dependency "dotenv", "~> 2.7"
+  spec.add_development_dependency "dotenv", "~> 3.1"
 
   spec.add_dependency "httparty", "~> 0.17"
 end