diff --git a/pdm.lock b/pdm.lock
index f118bb0a..846a8384 100644
--- a/pdm.lock
+++ b/pdm.lock
@@ -5,7 +5,7 @@
 groups = ["default", "dev"]
 strategy = ["inherit_metadata"]
 lock_version = "4.5.0"
-content_hash = "sha256:8f00178edf5ca94e80505682b3d1f8f0435a41518a7e43532f4af757727eed9b"
+content_hash = "sha256:5ac32c2f1cda73490ac68d893aad82e6d57f41c7bd7f194ff978a28f24cf51e9"
 
 [[metadata.targets]]
 requires_python = ">=3.10"
@@ -1460,16 +1460,16 @@ files = [
 
 [[package]]
 name = "yowasp-yosys"
-version = "0.53.0.0.post912"
+version = "0.55.0.3.post946.dev0"
+requires_python = "~=3.9"
 summary = "Yosys Open SYnthesis Suite"
 groups = ["default"]
 dependencies = [
     "click",
-    "importlib-resources; python_version < \"3.9\"",
     "yowasp-runtime~=1.12",
 ]
 files = [
-    {file = "yowasp_yosys-0.53.0.0.post912-py3-none-any.whl", hash = "sha256:681017e3d2fe8db2b5d5845233866ce19eca93d35dbcd5d3a0d0a8c23fcd9413"},
+    {file = "yowasp_yosys-0.55.0.3.post946.dev0-py3-none-any.whl", hash = "sha256:bc8a09dde5f3688e00de0b0b02098a5dfb65fbecc95af71f4a92718a17da08a4"},
 ]
 
 [[package]]
diff --git a/pyproject.toml b/pyproject.toml
index d32f09b6..3c964253 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,7 +18,6 @@ dependencies = [
     "amaranth[builtin-yosys]>=0.5,<0.7",
     "amaranth-soc @ git+https://github.com/amaranth-lang/amaranth-soc",
     "amaranth-boards @ git+https://github.com/amaranth-lang/amaranth-boards",
-    "yowasp-yosys>=0.41.0.0",
     "yowasp-nextpnr-ecp5>=0.7",
     "yowasp-runtime",
     "tomli>=2.0.1",
@@ -28,7 +27,7 @@ dependencies = [
     "python-dotenv>=1.0.1",
     "pydantic>=2.8",
     "halo>=0.0.31",
-    "yowasp-yosys!=0.54.*,!=0.55.*",
+    "yowasp-yosys>=0.55.0.3.post946.dev0",
 ]
 
 [project.scripts]