diff --git a/Gemfile b/Gemfile
index 0abd345..d965669 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,10 +4,6 @@ source 'https://rubygems.org'
 
 gemspec
 
-gem 'inferno_core',
-    git: 'https://github.com/inferno-framework/inferno-core.git',
-    branch: 'fi-3475-unit-testing-improvements'
-
 group :development, :test do
   gem 'debug'
   gem 'rubocop', '~> 1.56'
diff --git a/Gemfile.lock b/Gemfile.lock
index 982cbda..52ce86f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,40 +1,8 @@
-GIT
-  remote: https://github.com/inferno-framework/inferno-core.git
-  revision: cac216ad45293f8459ac0edfc9bc32ed081fe44b
-  branch: fi-3475-unit-testing-improvements
-  specs:
-    inferno_core (0.5.0)
-      activesupport (~> 6.1.7.5)
-      base62-rb (= 0.3.1)
-      blueprinter (= 0.25.2)
-      dotenv (~> 2.7)
-      dry-configurable (= 1.0.0)
-      dry-container (= 0.10.0)
-      dry-core (= 1.0.0)
-      dry-inflector (= 1.0.0)
-      dry-system (= 1.0.0)
-      faraday (~> 1.2)
-      faraday_middleware (~> 1.2)
-      fhir_client (>= 5.0.3)
-      fhir_models (>= 4.2.2)
-      hanami-controller (= 2.0.0)
-      hanami-router (= 2.0.0)
-      oj (= 3.11.0)
-      pastel (~> 0.8.0)
-      pry
-      pry-byebug
-      puma (~> 5.6.7)
-      rake (~> 13.0)
-      sequel (~> 5.42.0)
-      sidekiq (~> 7.2.4)
-      sqlite3 (~> 1.4)
-      thor (~> 1.2.1)
-      tty-markdown (~> 0.7.1)
-
 PATH
   remote: .
   specs:
     subscriptions_test_kit (0.9.3)
+      inferno_core (~> 0.5.0)
 
 GEM
   remote: https://rubygems.org/
@@ -165,6 +133,33 @@ GEM
       domain_name (~> 0.5)
     i18n (1.14.6)
       concurrent-ruby (~> 1.0)
+    inferno_core (0.5.1)
+      activesupport (~> 6.1.7.5)
+      base62-rb (= 0.3.1)
+      blueprinter (= 0.25.2)
+      dotenv (~> 2.7)
+      dry-configurable (= 1.0.0)
+      dry-container (= 0.10.0)
+      dry-core (= 1.0.0)
+      dry-inflector (= 1.0.0)
+      dry-system (= 1.0.0)
+      faraday (~> 1.2)
+      faraday_middleware (~> 1.2)
+      fhir_client (>= 5.0.3)
+      fhir_models (>= 4.2.2)
+      hanami-controller (= 2.0.0)
+      hanami-router (= 2.0.0)
+      oj (= 3.11.0)
+      pastel (~> 0.8.0)
+      pry
+      pry-byebug
+      puma (~> 5.6.7)
+      rake (~> 13.0)
+      sequel (~> 5.42.0)
+      sidekiq (~> 7.2.4)
+      sqlite3 (~> 1.4)
+      thor (~> 1.2.1)
+      tty-markdown (~> 0.7.1)
     io-console (0.7.2)
     irb (1.13.1)
       rdoc (>= 4.0.0)
@@ -172,17 +167,17 @@ GEM
     json (2.7.2)
     jwt (2.9.3)
       base64
-    kramdown (2.5.0)
-      rexml (>= 3.3.6)
+    kramdown (2.5.1)
+      rexml (>= 3.3.9)
     language_server-protocol (3.17.0.3)
-    logger (1.6.1)
+    logger (1.6.2)
     method_source (1.1.0)
     mime-types (3.6.0)
       logger
       mime-types-data (~> 3.2015)
     mime-types-data (3.2024.1105)
-    mini_portile2 (2.8.7)
-    minitest (5.25.1)
+    mini_portile2 (2.8.8)
+    minitest (5.25.2)
     multi_json (1.15.0)
     multi_xml (0.7.1)
       bigdecimal (~> 3.1)
@@ -341,7 +336,6 @@ DEPENDENCIES
   database_cleaner-sequel (~> 1.8)
   debug
   factory_bot (~> 6.1)
-  inferno_core!
   rack-test
   roo (~> 2.10.1)
   rspec (~> 3.10)
diff --git a/subscriptions_test_kit.gemspec b/subscriptions_test_kit.gemspec
index d8e0c5a..0bcda7f 100644
--- a/subscriptions_test_kit.gemspec
+++ b/subscriptions_test_kit.gemspec
@@ -9,7 +9,7 @@ Gem::Specification.new do |spec|
   spec.description   = 'Inferno test kit for FHIR R5-style Subscriptions'
   spec.homepage      = 'https://github.com/inferno-framework/subscriptions-test-kit'
   spec.license       = 'Apache-2.0'
-  # spec.add_dependency 'inferno_core', '~> 0.5.0'
+  spec.add_dependency 'inferno_core', '~> 0.5.0'
   spec.required_ruby_version = Gem::Requirement.new('>= 3.1.2')
   spec.metadata['homepage_uri'] = spec.homepage
   spec.metadata['source_code_uri'] = spec.homepage