diff --git a/ci/resources/stemcell-version-bump/go.mod b/ci/resources/stemcell-version-bump/go.mod
index 45afccf6b..07bc508b3 100644
--- a/ci/resources/stemcell-version-bump/go.mod
+++ b/ci/resources/stemcell-version-bump/go.mod
@@ -7,7 +7,7 @@ toolchain go1.24.1
 require (
 	cloud.google.com/go/storage v1.59.2
 	github.com/stretchr/testify v1.11.1
-	google.golang.org/api v0.264.0
+	google.golang.org/api v0.265.0
 )
 
 require (
@@ -55,7 +55,7 @@ require (
 	golang.org/x/time v0.14.0 // indirect
 	google.golang.org/genproto v0.0.0-20251202230838-ff82c1b0f217 // indirect
 	google.golang.org/genproto/googleapis/api v0.0.0-20251202230838-ff82c1b0f217 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20260122232226-8e98ce8d340d // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20260128011058-8636f8732409 // indirect
 	google.golang.org/grpc v1.78.0 // indirect
 	google.golang.org/protobuf v1.36.11 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
diff --git a/ci/resources/stemcell-version-bump/go.sum b/ci/resources/stemcell-version-bump/go.sum
index 8435a63a5..9b7183495 100644
--- a/ci/resources/stemcell-version-bump/go.sum
+++ b/ci/resources/stemcell-version-bump/go.sum
@@ -115,14 +115,14 @@ golang.org/x/time v0.14.0 h1:MRx4UaLrDotUKUdCIqzPC48t1Y9hANFKIRpNx+Te8PI=
 golang.org/x/time v0.14.0/go.mod h1:eL/Oa2bBBK0TkX57Fyni+NgnyQQN4LitPmob2Hjnqw4=
 gonum.org/v1/gonum v0.16.0 h1:5+ul4Swaf3ESvrOnidPp4GZbzf0mxVQpDCYUQE7OJfk=
 gonum.org/v1/gonum v0.16.0/go.mod h1:fef3am4MQ93R2HHpKnLk4/Tbh/s0+wqD5nfa6Pnwy4E=
-google.golang.org/api v0.264.0 h1:+Fo3DQXBK8gLdf8rFZ3uLu39JpOnhvzJrLMQSoSYZJM=
-google.golang.org/api v0.264.0/go.mod h1:fAU1xtNNisHgOF5JooAs8rRaTkl2rT3uaoNGo9NS3R8=
+google.golang.org/api v0.265.0 h1:FZvfUdI8nfmuNrE34aOWFPmLC+qRBEiNm3JdivTvAAU=
+google.golang.org/api v0.265.0/go.mod h1:uAvfEl3SLUj/7n6k+lJutcswVojHPp2Sp08jWCu8hLY=
 google.golang.org/genproto v0.0.0-20251202230838-ff82c1b0f217 h1:GvESR9BIyHUahIb0NcTum6itIWtdoglGX+rnGxm2934=
 google.golang.org/genproto v0.0.0-20251202230838-ff82c1b0f217/go.mod h1:yJ2HH4EHEDTd3JiLmhds6NkJ17ITVYOdV3m3VKOnws0=
 google.golang.org/genproto/googleapis/api v0.0.0-20251202230838-ff82c1b0f217 h1:fCvbg86sFXwdrl5LgVcTEvNC+2txB5mgROGmRL5mrls=
 google.golang.org/genproto/googleapis/api v0.0.0-20251202230838-ff82c1b0f217/go.mod h1:+rXWjjaukWZun3mLfjmVnQi18E1AsFbDN9QdJ5YXLto=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20260122232226-8e98ce8d340d h1:xXzuihhT3gL/ntduUZwHECzAn57E8dA6l8SOtYWdD8Q=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20260122232226-8e98ce8d340d/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260128011058-8636f8732409 h1:H86B94AW+VfJWDqFeEbBPhEtHzJwJfTbgE2lZa54ZAQ=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260128011058-8636f8732409/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ=
 google.golang.org/grpc v1.78.0 h1:K1XZG/yGDJnzMdd/uZHAkVqJE+xIDOcmdSFZkBUicNc=
 google.golang.org/grpc v1.78.0/go.mod h1:I47qjTo4OKbMkjA/aOOwxDIiPSBofUtQUI5EfpWvW7U=
 google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
diff --git a/ci/resources/stemcell-version-bump/vendor/google.golang.org/api/internal/gensupport/media.go b/ci/resources/stemcell-version-bump/vendor/google.golang.org/api/internal/gensupport/media.go
index ec3bf1bae..4aa05f905 100644
--- a/ci/resources/stemcell-version-bump/vendor/google.golang.org/api/internal/gensupport/media.go
+++ b/ci/resources/stemcell-version-bump/vendor/google.golang.org/api/internal/gensupport/media.go
@@ -198,6 +198,22 @@ func (mi *MediaInfo) UploadType() string {
 	return "resumable"
 }
 
+// ChecksumEnabled returns if auto checksum is enabled in buffer.
+func (mi *MediaInfo) ChecksumEnabled() bool {
+	return mi.buffer != nil && mi.buffer.enableAutoChecksum
+}
+
+// GetAutoChecksum returns the computed auto checksum from buffer (if enabled).
+// Make sure whole data is written and read from the buffer before calling this
+// function to get correct checksum of the data.
+func (mi *MediaInfo) GetAutoChecksum() string {
+	if mi.buffer != nil &&
+		mi.buffer.enableAutoChecksum {
+		return encodeUint32(mi.buffer.fullObjectChecksum)
+	}
+	return ""
+}
+
 // UploadRequest sets up an HTTP request for media upload. It adds headers
 // as necessary, and returns a replacement for the body and a function for http.Request.GetBody.
 func (mi *MediaInfo) UploadRequest(reqHeaders http.Header, body io.Reader) (newBody io.Reader, getBody func() (io.ReadCloser, error), cleanup func()) {
diff --git a/ci/resources/stemcell-version-bump/vendor/google.golang.org/api/internal/version.go b/ci/resources/stemcell-version-bump/vendor/google.golang.org/api/internal/version.go
index 277a76fa7..8f6211509 100644
--- a/ci/resources/stemcell-version-bump/vendor/google.golang.org/api/internal/version.go
+++ b/ci/resources/stemcell-version-bump/vendor/google.golang.org/api/internal/version.go
@@ -5,4 +5,4 @@
 package internal
 
 // Version is the current tagged release of the library.
-const Version = "0.264.0"
+const Version = "0.265.0"
diff --git a/ci/resources/stemcell-version-bump/vendor/google.golang.org/api/storage/v1/storage-gen.go b/ci/resources/stemcell-version-bump/vendor/google.golang.org/api/storage/v1/storage-gen.go
index e53d63096..da9d74863 100644
--- a/ci/resources/stemcell-version-bump/vendor/google.golang.org/api/storage/v1/storage-gen.go
+++ b/ci/resources/stemcell-version-bump/vendor/google.golang.org/api/storage/v1/storage-gen.go
@@ -11000,6 +11000,14 @@ func (c *ObjectsInsertCall) Header() http.Header {
 
 func (c *ObjectsInsertCall) doRequest(alt string) (*http.Response, error) {
 	reqHeaders := gensupport.SetHeaders(c.s.userAgent(), "application/json", c.header_)
+	// Set auto checksum in case of a single chunk upload if enabled.
+	if c.object != nil &&
+		c.object.Crc32c == "" &&
+		c.mediaInfo_ != nil &&
+		c.mediaInfo_.UploadType() == "multipart" &&
+		c.mediaInfo_.ChecksumEnabled() {
+		c.object.Crc32c = c.mediaInfo_.GetAutoChecksum()
+	}
 	body, err := googleapi.WithoutDataWrapper.JSONBuffer(c.object)
 	if err != nil {
 		return nil, err
diff --git a/ci/resources/stemcell-version-bump/vendor/modules.txt b/ci/resources/stemcell-version-bump/vendor/modules.txt
index d9f43d64a..14a282d2d 100644
--- a/ci/resources/stemcell-version-bump/vendor/modules.txt
+++ b/ci/resources/stemcell-version-bump/vendor/modules.txt
@@ -308,7 +308,7 @@ golang.org/x/text/unicode/norm
 # golang.org/x/time v0.14.0
 ## explicit; go 1.24.0
 golang.org/x/time/rate
-# google.golang.org/api v0.264.0
+# google.golang.org/api v0.265.0
 ## explicit; go 1.24.0
 google.golang.org/api/googleapi
 google.golang.org/api/googleapi/transport
@@ -341,7 +341,7 @@ google.golang.org/genproto/googleapis/api/expr/v1alpha1
 google.golang.org/genproto/googleapis/api/label
 google.golang.org/genproto/googleapis/api/metric
 google.golang.org/genproto/googleapis/api/monitoredres
-# google.golang.org/genproto/googleapis/rpc v0.0.0-20260122232226-8e98ce8d340d
+# google.golang.org/genproto/googleapis/rpc v0.0.0-20260128011058-8636f8732409
 ## explicit; go 1.24.0
 google.golang.org/genproto/googleapis/rpc/code
 google.golang.org/genproto/googleapis/rpc/errdetails