diff --git a/go.mod b/go.mod
index 4174084d2..4bafd8860 100644
--- a/go.mod
+++ b/go.mod
@@ -13,7 +13,7 @@ require (
 	github.com/fsnotify/fsnotify v1.8.0
 	github.com/go-zookeeper/zk v1.0.4
 	github.com/gomodule/redigo v1.9.2
-	github.com/hashicorp/consul/api v1.30.0
+	github.com/hashicorp/consul/api v1.31.0
 	github.com/hashicorp/vault/api v1.15.0
 	github.com/kelseyhightower/memkv v0.1.1
 	github.com/sirupsen/logrus v1.9.3
diff --git a/go.sum b/go.sum
index 5bdbf020f..bfcda446b 100644
--- a/go.sum
+++ b/go.sum
@@ -67,8 +67,8 @@ github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
-github.com/hashicorp/consul/api v1.30.0 h1:ArHVMMILb1nQv8vZSGIwwQd2gtc+oSQZ6CalyiyH2XQ=
-github.com/hashicorp/consul/api v1.30.0/go.mod h1:B2uGchvaXVW2JhFoS8nqTxMD5PBykr4ebY4JWHTTeLM=
+github.com/hashicorp/consul/api v1.31.0 h1:32BUNLembeSRek0G/ZAM6WNfdEwYdYo8oQ4+JoqGkNQ=
+github.com/hashicorp/consul/api v1.31.0/go.mod h1:2ZGIiXM3A610NmDULmCHd/aqBJj8CkMfOhswhOafxRg=
 github.com/hashicorp/consul/sdk v0.16.1 h1:V8TxTnImoPD5cj0U9Spl0TUxcytjcbbJeADFF07KdHg=
 github.com/hashicorp/consul/sdk v0.16.1/go.mod h1:fSXvwxB2hmh1FMZCNl6PwX0Q/1wdWtHJcZ7Ea5tns0s=
 github.com/hashicorp/errwrap v1.0.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=
diff --git a/vendor/github.com/hashicorp/consul/api/api.go b/vendor/github.com/hashicorp/consul/api/api.go
index d4d853d5d..27af1ea56 100644
--- a/vendor/github.com/hashicorp/consul/api/api.go
+++ b/vendor/github.com/hashicorp/consul/api/api.go
@@ -1087,8 +1087,23 @@ func (c *Client) doRequest(r *request) (time.Duration, *http.Response, error) {
 	if err != nil {
 		return 0, nil, err
 	}
+
+	contentType := GetContentType(req)
+
+	if req != nil {
+		req.Header.Set(contentTypeHeader, contentType)
+	}
+
 	start := time.Now()
 	resp, err := c.config.HttpClient.Do(req)
+
+	if resp != nil {
+		respContentType := resp.Header.Get(contentTypeHeader)
+		if respContentType == "" || respContentType != contentType {
+			resp.Header.Set(contentTypeHeader, contentType)
+		}
+	}
+
 	diff := time.Since(start)
 	return diff, resp, err
 }
diff --git a/vendor/github.com/hashicorp/consul/api/content_type.go b/vendor/github.com/hashicorp/consul/api/content_type.go
new file mode 100644
index 000000000..37c8cf60a
--- /dev/null
+++ b/vendor/github.com/hashicorp/consul/api/content_type.go
@@ -0,0 +1,81 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
+package api
+
+import (
+	"net/http"
+	"strings"
+)
+
+const (
+	contentTypeHeader = "Content-Type"
+	plainContentType  = "text/plain; charset=utf-8"
+	octetStream       = "application/octet-stream"
+	jsonContentType   = "application/json" // Default content type
+)
+
+// ContentTypeRule defines a rule for determining the content type of an HTTP request.
+// This rule is based on the combination of the HTTP path, method, and the desired content type.
+type ContentTypeRule struct {
+	path        string
+	httpMethod  string
+	contentType string
+}
+
+var ContentTypeRules = []ContentTypeRule{
+	{
+		path:        "/v1/snapshot",
+		httpMethod:  http.MethodPut,
+		contentType: octetStream,
+	},
+	{
+		path:        "/v1/kv",
+		httpMethod:  http.MethodPut,
+		contentType: octetStream,
+	},
+	{
+		path:        "/v1/event/fire",
+		httpMethod:  http.MethodPut,
+		contentType: octetStream,
+	},
+}
+
+// GetContentType returns the content type for a request
+// This function isused as routing logic or middleware to determine and enforce
+// the appropriate content type for HTTP requests.
+func GetContentType(req *http.Request) string {
+	reqContentType := req.Header.Get(contentTypeHeader)
+
+	if isIndexPage(req) {
+		return plainContentType
+	}
+
+	// For GET, DELETE, or internal API paths, ensure a valid Content-Type is returned.
+	if req.Method == http.MethodGet || req.Method == http.MethodDelete || strings.HasPrefix(req.URL.Path, "/v1/internal") {
+		if reqContentType == "" {
+			// Default to JSON Content-Type if no Content-Type is provided.
+			return jsonContentType
+		}
+		// Return the provided Content-Type if it exists.
+		return reqContentType
+	}
+
+	for _, rule := range ContentTypeRules {
+		if matchesRule(req, rule) {
+			return rule.contentType
+		}
+	}
+	return jsonContentType
+}
+
+// matchesRule checks if a request matches a content type rule
+func matchesRule(req *http.Request, rule ContentTypeRule) bool {
+	return strings.HasPrefix(req.URL.Path, rule.path) &&
+		(rule.httpMethod == "" || req.Method == rule.httpMethod)
+}
+
+// isIndexPage checks if the request is for the index page
+func isIndexPage(req *http.Request) bool {
+	return req.URL.Path == "/" || req.URL.Path == "/ui"
+}
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 9a2fe8ef7..32f0d6f8d 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -88,7 +88,7 @@ github.com/golang/protobuf/proto
 # github.com/gomodule/redigo v1.9.2
 ## explicit; go 1.17
 github.com/gomodule/redigo/redis
-# github.com/hashicorp/consul/api v1.30.0
+# github.com/hashicorp/consul/api v1.31.0
 ## explicit; go 1.19
 github.com/hashicorp/consul/api
 # github.com/hashicorp/errwrap v1.1.0