diff --git a/Gemfile b/Gemfile
index 39e50360..2f55047a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,7 +9,7 @@ ruby '2.7.6'
 gem 'mitc_service', path: 'components/mitc_service'
 
 gem 'aca_entities',  git:  'https://github.com/ideacrew/aca_entities.git', branch: 'trunk'
-gem 'event_source',  git:  'https://github.com/ideacrew/event_source.git', branch: 'trunk'
+gem 'event_source',  git:  'https://github.com/ideacrew/event_source.git', branch: 'test_commit'
 
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails', branch: 'main'
 gem 'rails', '~> 6.1.3'
diff --git a/Gemfile.lock b/Gemfile.lock
index 70836090..5e81a1e8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -18,10 +18,10 @@ GIT
 
 GIT
   remote: https://github.com/ideacrew/event_source.git
-  revision: 29393ebb04df8f57ccb536da4635087c8c8bde0b
-  branch: trunk
+  revision: a34cb363d906cb4fe2ac2b7c6f38baf89b9a2543
+  branch: test_commit
   specs:
-    event_source (0.5.5)
+    event_source (0.5.8)
       bunny (>= 2.14)
       deep_merge (~> 1.2.0)
       dry-events (~> 0.3)
diff --git a/components/mitc_service/Gemfile b/components/mitc_service/Gemfile
index b979c331..8c57d683 100644
--- a/components/mitc_service/Gemfile
+++ b/components/mitc_service/Gemfile
@@ -10,7 +10,7 @@ gemspec
 # gem 'byebug', group: [:development, :test]
 
 gem 'aca_entities', git:  'https://github.com/ideacrew/aca_entities.git', branch: 'trunk'
-gem 'event_source',  git:  'https://github.com/ideacrew/event_source.git', branch: 'trunk'
+gem 'event_source',  git:  'https://github.com/ideacrew/event_source.git', branch: 'test_commit'
 
 group :development, :test do
   gem "rspec-rails"
diff --git a/components/mitc_service/Gemfile.lock b/components/mitc_service/Gemfile.lock
index 86fe092a..eb46284a 100644
--- a/components/mitc_service/Gemfile.lock
+++ b/components/mitc_service/Gemfile.lock
@@ -17,10 +17,10 @@ GIT
 
 GIT
   remote: https://github.com/ideacrew/event_source.git
-  revision: 29393ebb04df8f57ccb536da4635087c8c8bde0b
-  branch: trunk
+  revision: a34cb363d906cb4fe2ac2b7c6f38baf89b9a2543
+  branch: test_commit
   specs:
-    event_source (0.5.5)
+    event_source (0.5.8)
       bunny (>= 2.14)
       deep_merge (~> 1.2.0)
       dry-events (~> 0.3)