diff --git a/changelog.d/1040.fixed.md b/changelog.d/1040.fixed.md
new file mode 100644
index 00000000..2ed6602c
--- /dev/null
+++ b/changelog.d/1040.fixed.md
@@ -0,0 +1 @@
+Update to b2sdk 2.5.1 to fix `b2 sync` stopping when encountering inaccessible directory.
diff --git a/pdm.lock b/pdm.lock
index b280eb77..5c4b33fc 100644
--- a/pdm.lock
+++ b/pdm.lock
@@ -5,7 +5,7 @@
 groups = ["default", "bundle", "doc", "format", "full", "license", "lint", "release", "test"]
 strategy = ["cross_platform", "inherit_metadata"]
 lock_version = "4.4.2"
-content_hash = "sha256:86f0f4c209c9369a41e4fed4cea47a8b305f1c51c832026cfe5752ee9956941e"
+content_hash = "sha256:21968e39f70fc3d735a43ff08a18447853e13cca6771f13a0360caadd4a16b71"
 
 [[package]]
 name = "alabaster"
@@ -112,7 +112,7 @@ files = [
 
 [[package]]
 name = "b2sdk"
-version = "2.5.0"
+version = "2.5.1"
 requires_python = ">=3.7"
 summary = "Backblaze B2 SDK"
 groups = ["default"]
@@ -123,8 +123,8 @@ dependencies = [
     "typing-extensions>=4.7.1; python_version < \"3.12\"",
 ]
 files = [
-    {file = "b2sdk-2.5.0-py3-none-any.whl", hash = "sha256:38bf80a6cd2bff5b104f7fd10023cf9e338c6f9d41da6108db5ad68f76f5abaa"},
-    {file = "b2sdk-2.5.0.tar.gz", hash = "sha256:d7c20125e64508a730e56307d75284790079cdb88e63851fff820a09b24fb1d9"},
+    {file = "b2sdk-2.5.1-py3-none-any.whl", hash = "sha256:71de4a24c113ea1836ba4aa4569e4e6374daeaa58272e342679070424440fee1"},
+    {file = "b2sdk-2.5.1.tar.gz", hash = "sha256:fb75c831d6ea875522e78f0c42b784771dc31e6bb64f3eb9f379bdc85eb35a3f"},
 ]
 
 [[package]]
diff --git a/pyproject.toml b/pyproject.toml
index ed6e8fdf..9a06a37d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,7 @@ classifiers = [
 dependencies = [
     "argcomplete>=2,<4",
     "arrow>=1.0.2,<2.0.0",
-    "b2sdk>=2.5.0,<3",
+    "b2sdk>=2.5.1,<3",
     "docutils>=0.18.1",
     "idna~=3.4; platform_system == 'Java'",
     "importlib-metadata>=3.3; python_version < '3.8'",