diff --git a/go.mod b/go.mod
index 8dbaa86..afecf67 100644
--- a/go.mod
+++ b/go.mod
@@ -4,7 +4,7 @@ go 1.23.0
 
 require (
 	github.com/dave/jennifer v1.4.1
-	github.com/palantir/conjure-go-runtime/v2 v2.84.0
+	github.com/palantir/conjure-go-runtime/v2 v2.86.0
 	github.com/palantir/godel/v2 v2.121.0
 	github.com/palantir/pkg/cobracli v1.2.0
 	github.com/palantir/pkg/refreshable v1.5.0
diff --git a/go.sum b/go.sum
index 9fa142b..57bfc69 100644
--- a/go.sum
+++ b/go.sum
@@ -55,8 +55,8 @@ github.com/nwaples/rardecode v1.1.0 h1:vSxaY8vQhOcVr4mm5e8XllHWTiM4JF507A0Katqw7
 github.com/nwaples/rardecode v1.1.0/go.mod h1:5DzqNKiOdpKKBH87u8VlvAnPZMXcGRhxWkRpHbbfGS0=
 github.com/openzipkin/zipkin-go v0.2.2 h1:nY8Hti+WKaP0cRsSeQ026wU03QsM762XBeCXBb9NAWI=
 github.com/openzipkin/zipkin-go v0.2.2/go.mod h1:NaW6tEwdmWMaCDZzg8sh+IBNOxHMPnhQw8ySjnjRyN4=
-github.com/palantir/conjure-go-runtime/v2 v2.84.0 h1:m7lI4wylGO7dvZmufeIUQ/8yO8blZvwChk4Z+oHxOKU=
-github.com/palantir/conjure-go-runtime/v2 v2.84.0/go.mod h1:66/CTCvFVD/FhpxRPG0uluTpF97nE2PTwbYT3lvU9ZE=
+github.com/palantir/conjure-go-runtime/v2 v2.86.0 h1:q/176kxQAbk+4Vmf0JAziHSnpVWKFFRKqEtJ8YjFGto=
+github.com/palantir/conjure-go-runtime/v2 v2.86.0/go.mod h1:66/CTCvFVD/FhpxRPG0uluTpF97nE2PTwbYT3lvU9ZE=
 github.com/palantir/go-metrics v1.1.1 h1:YL/UmptBjrC6iSCTVr7vfuIcjL0M359Da3/gBGNny10=
 github.com/palantir/go-metrics v1.1.1/go.mod h1:fRkuipBnsI4nD8Vd9UNcrUJvD8Y0wOJMSbicygcBrGs=
 github.com/palantir/godel/v2 v2.121.0 h1:K8hLahXf+bioleaXz1Z5veOR5XwOcYtHnpSJc8f0RqU=
diff --git a/vendor/github.com/palantir/conjure-go-runtime/v2/conjure-go-client/httpclient/body_types.go b/vendor/github.com/palantir/conjure-go-runtime/v2/conjure-go-client/httpclient/body_types.go
index a440967..992e970 100644
--- a/vendor/github.com/palantir/conjure-go-runtime/v2/conjure-go-client/httpclient/body_types.go
+++ b/vendor/github.com/palantir/conjure-go-runtime/v2/conjure-go-client/httpclient/body_types.go
@@ -36,8 +36,17 @@ type RequestBody interface {
 // fields of the provided *http.Request to the values returned by the function.
 type requestBodyFunc func() (length int64, body io.ReadCloser, getBody func() (io.ReadCloser, error), err error)
 
-func (f requestBodyFunc) setRequestBody(req *http.Request) (err error) {
-	req.ContentLength, req.Body, req.GetBody, err = f()
+func (f requestBodyFunc) setRequestBody(req *http.Request) error {
+	contentLength, body, getBody, err := f()
+	if err != nil {
+		return err
+	}
+	if body == nil {
+		body = http.NoBody
+		contentLength = 0
+		getBody = nil
+	}
+	req.ContentLength, req.Body, req.GetBody = contentLength, body, getBody
 	return err
 }
 
@@ -188,3 +197,15 @@ func RequestBodyEncoderObjectBuffer(input any, encoder codecs.Encoder, buffer *b
 		return int64(len(raw)), body, getBody, nil
 	})
 }
+
+// RetrieveReaderFromRequestBody extracts the io.ReadCloser and ContentLength from the RequestBody.
+// It is primarily useful for testing.
+// This reader does not 'count' as a stream for RequestBodyStreamOnce constraints and
+// subsequent requests made using the same RequestBody will use a corrupt already-read body.
+func RetrieveReaderFromRequestBody(body RequestBody) (io.ReadCloser, int64, error) {
+	req := &http.Request{}
+	if err := body.setRequestBody(req); err != nil {
+		return nil, 0, err
+	}
+	return req.Body, req.ContentLength, nil
+}
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 65aef91..b3290da 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -34,7 +34,7 @@ github.com/mattn/go-runewidth
 # github.com/nmiyake/pkg/errorstringer v1.1.0
 ## explicit; go 1.16
 github.com/nmiyake/pkg/errorstringer
-# github.com/palantir/conjure-go-runtime/v2 v2.84.0
+# github.com/palantir/conjure-go-runtime/v2 v2.86.0
 ## explicit; go 1.22.0
 github.com/palantir/conjure-go-runtime/v2/conjure-go-client/httpclient
 github.com/palantir/conjure-go-runtime/v2/conjure-go-client/httpclient/internal