diff --git a/craft_application/errors.py b/craft_application/errors.py
index 37060e59..7a637a9e 100644
--- a/craft_application/errors.py
+++ b/craft_application/errors.py
@@ -101,7 +101,9 @@ def from_parts_error(cls, err: craft_parts.PartsError) -> Self:
     @classmethod
     def from_os_error(cls, err: OSError) -> Self:
         """Create a PartsLifecycleError from an OSError."""
-        message = f"{err.filename}: {err.strerror}" if err.filename else err.strerror
+        message = (
+            f"{err.filename}: {err.strerror}" if err.filename else str(err.strerror)
+        )
         details = err.__class__.__name__
         if err.filename:
             details += f": filename: {err.filename!r}"
diff --git a/pyproject.toml b/pyproject.toml
index 124ecf5f..064e39a4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -51,15 +51,15 @@ remote = [
     "pyxdg>=0.27",
 ]
 lint = [
-    "black~=24.0",
-    "codespell[toml]==2.3.0",
-    "yamllint==1.35.1"
+    "codespell[toml]~=2.3",
+    "yamllint~=1.35"
 ]
 types = [
-    "mypy[reports]==1.12.0",
-    "pyright==1.1.385",
+    "mypy[reports]~=1.12",
+    "pyright==1.1.390",
     "types-requests",
     "types-urllib3",
+    "types-pyyaml"
 ]
 docs = [
     "canonical-sphinx~=0.2.0",