diff --git a/.travis.yml b/.travis.yml
index d3cdaa5e2..f678a85b4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,6 +14,7 @@ rvm:
   - 2.4.9
   - 2.5.7
   - 2.6.5
+  - 2.7.0
 
 env:
   - RAILS_VERSION=4
diff --git a/sentry-raven.gemspec b/sentry-raven.gemspec
index ad2876c21..13c715d93 100644
--- a/sentry-raven.gemspec
+++ b/sentry-raven.gemspec
@@ -18,4 +18,5 @@ Gem::Specification.new do |gem|
   gem.executables = "raven"
 
   gem.add_dependency "faraday", ">= 1.0"
+  gem.add_dependency "json", "<= 2.2.0"
 end