diff --git a/proxy/process.go b/proxy/process.go
index 0969d1c..fa31c18 100644
--- a/proxy/process.go
+++ b/proxy/process.go
@@ -8,6 +8,7 @@ import (
 	"net/http"
 	"net/url"
 	"os/exec"
+	"strconv"
 	"strings"
 	"sync"
 	"syscall"
@@ -439,6 +440,12 @@ func (p *Process) ProxyRequest(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	req.Header = r.Header.Clone()
+
+	contentLength, err := strconv.ParseInt(req.Header.Get("content-length"), 10, 64)
+	if err == nil {
+		req.ContentLength = contentLength
+	}
+
 	resp, err := client.Do(req)
 	if err != nil {
 		http.Error(w, err.Error(), http.StatusBadGateway)
diff --git a/proxy/proxymanager.go b/proxy/proxymanager.go
index dad43ec..9763722 100644
--- a/proxy/proxymanager.go
+++ b/proxy/proxymanager.go
@@ -371,6 +371,7 @@ func (pm *ProxyManager) proxyOAIHandler(c *gin.Context) {
 
 	// dechunk it as we already have all the body bytes see issue #11
 	c.Request.Header.Del("transfer-encoding")
+	c.Request.Header.Del("content-length")
 	c.Request.Header.Add("content-length", strconv.Itoa(len(bodyBytes)))
 
 	if err := processGroup.ProxyRequest(realModelName, c.Writer, c.Request); err != nil {