diff --git a/coreblocks/core.py b/coreblocks/core.py
index 913654f1c..308b835a4 100644
--- a/coreblocks/core.py
+++ b/coreblocks/core.py
@@ -136,8 +136,9 @@ def elaborate(self, platform):
 
         m.submodules.exception_information_register = self.exception_information_register
 
-        if self.connections.dependency_provided(FetchResumeKey()):
-            fetch_resume_fb, fetch_resume_unifiers = self.connections.get_dependency(FetchResumeKey())
+        fetch_resume = self.connections.get_optional_dependency(FetchResumeKey())
+        if fetch_resume is not None:
+            fetch_resume_fb, fetch_resume_unifiers = fetch_resume
             m.submodules.fetch_resume_unifiers = ModuleConnector(**fetch_resume_unifiers)
 
             m.submodules.fetch_resume_connector = ConnectTrans(fetch_resume_fb, self.frontend.resume_from_unsafe)
diff --git a/requirements.txt b/requirements.txt
index 110a59f30..ac53cf74e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 amaranth-stubs @ git+https://github.com/kuznia-rdzeni/amaranth-stubs.git@edb302b001433edf4c8568190adc9bd0c0039f45
-transactron @ git+https://github.com/kuznia-rdzeni/transactron.git@6893f9aced6a8671f34a5007894e72273162af1b
+transactron @ git+https://github.com/kuznia-rdzeni/transactron.git@af951bcae97ab5c926581b76622bcb20702b4fdf
 amaranth-yosys==0.40.0.0.post100
 amaranth==0.5.3
 dataclasses-json==0.6.3