diff --git a/src_assets/common/assets/web/apps.html b/src_assets/common/assets/web/apps.html
index 7e7acb3d..252492dc 100644
--- a/src_assets/common/assets/web/apps.html
+++ b/src_assets/common/assets/web/apps.html
@@ -599,7 +599,10 @@
 
         fetch("./api/apps/reorder", {
           credentials: 'include',
-          method: "POST",
+          headers: {
+            'Content-Type': 'application/json'
+          },
+          method: 'POST',
           body: JSON.stringify({order: reorderedUUIDs})
         })
         .then(r => r.json())
@@ -636,7 +639,7 @@
           this.actionDisabled = true;
           fetch("./api/apps/launch?uuid=" + app.uuid, {
             credentials: 'include',
-            method: "POST",
+            method: 'POST',
           })
           .then(r => r.json())
           .then(r => {
@@ -655,7 +658,7 @@
           this.actionDisabled = true;
           fetch("./api/apps/close", {
             credentials: 'include',
-            method: "POST"
+            method: 'POST',
           })
           .then((r) => r.json())
           .then((r) => {
@@ -681,7 +684,7 @@
           this.actionDisabled = true;
           fetch("./api/apps/delete?uuid=" + app.uuid, {
             credentials: 'include',
-            method: "POST"
+            method: 'POST'
           }).then((r) => r.json())
           .then((r) => {
             if (!r.status) {
@@ -789,7 +792,10 @@
         this.coverFinderBusy = true;
         fetch("./api/covers/upload", {
           credentials: 'include',
-          method: "POST",
+          headers: {
+            'Content-Type': 'application/json'
+          },
+          method: 'POST',
           body: JSON.stringify({
             key: cover.key,
             url: cover.saveUrl,
@@ -814,7 +820,10 @@
         delete this.editForm.dragover;
         fetch("./api/apps", {
           credentials: 'include',
-          method: "POST",
+          headers: {
+            'Content-Type': 'application/json'
+          },
+          method: 'POST',
           body: JSON.stringify(this.editForm),
         }).then((r) => r.json())
         .then((r) => {
diff --git a/src_assets/common/assets/web/config.html b/src_assets/common/assets/web/config.html
index bc495e16..91a64720 100644
--- a/src_assets/common/assets/web/config.html
+++ b/src_assets/common/assets/web/config.html
@@ -437,7 +437,10 @@
 
         return fetch("./api/config", {
           credentials: 'include',
-          method: "POST",
+          headers: {
+            'Content-Type': 'application/json'
+          },
+          method: 'POST',
           body: JSON.stringify(config),
         }).then((r) => {
           if (r.status === 200) {
@@ -460,7 +463,7 @@
               this.saved = this.restarted = false;
             }, 5000);
             fetch("./api/restart", {
-              method: "POST"
+              method: 'POST'
             })
             .then((resp) => {
               if (resp.status !== 200) {
diff --git a/src_assets/common/assets/web/login.html b/src_assets/common/assets/web/login.html
index 1749dc45..b72f86f3 100644
--- a/src_assets/common/assets/web/login.html
+++ b/src_assets/common/assets/web/login.html
@@ -89,7 +89,10 @@
           localStorage.removeItem('login')
         }
         fetch("./api/login", {
-          method: "POST",
+          headers: {
+            'Content-Type': 'application/json'
+          },
+          method: 'POST',
           body: JSON.stringify(this.passwordData),
         }).then((res) => {
           this.loading = false;
diff --git a/src_assets/common/assets/web/password.html b/src_assets/common/assets/web/password.html
index 64e8fcd5..7fbcf304 100644
--- a/src_assets/common/assets/web/password.html
+++ b/src_assets/common/assets/web/password.html
@@ -96,7 +96,10 @@
         this.error = null;
         fetch("./api/password", {
           credentials: 'include',
-          method: "POST",
+          headers: {
+            'Content-Type': 'application/json'
+          },
+          method: 'POST',
           body: JSON.stringify(this.passwordData),
         }).then((r) => {
           if (r.status === 200) {
diff --git a/src_assets/common/assets/web/pin.html b/src_assets/common/assets/web/pin.html
index d3f50133..dd9755a5 100644
--- a/src_assets/common/assets/web/pin.html
+++ b/src_assets/common/assets/web/pin.html
@@ -393,7 +393,10 @@
         let b = JSON.stringify({pin: pin, name: name});
         fetch("./api/pin", {
           credentials: 'include',
-          method: "POST",
+          headers: {
+            'Content-Type': 'application/json'
+          },
+          method: 'POST',
           body: b
         })
           .then((response) => response.json())
@@ -537,7 +540,10 @@
         }
         fetch("./api/clients/update", {
           credentials: 'include',
-          method: "POST",
+          headers: {
+            'Content-Type': 'application/json'
+          },
+          method: 'POST',
           body: JSON.stringify(editedClient)
         })
         .catch(err => {
@@ -583,7 +589,10 @@
       disconnectClient(uuid) {
         fetch("./api/clients/disconnect", {
           credentials: 'include',
-          method: "POST",
+          headers: {
+            'Content-Type': 'application/json'
+          },
+          method: 'POST',
           body: JSON.stringify({ uuid })
         }).finally(() => {
           setTimeout(() => {
@@ -595,7 +604,7 @@
         this.unpairAllPressed = true;
         fetch("./api/clients/unpair-all", {
           credentials: 'include',
-          method: "POST"
+          method: 'POST'
         })
           .then((r) => r.json())
           .then((r) => {
@@ -610,7 +619,10 @@
       unpairSingle(uuid) {
         fetch("./api/clients/unpair", {
           credentials: 'include',
-          method: "POST",
+          headers: {
+            'Content-Type': 'application/json'
+          },
+          method: 'POST',
           body: JSON.stringify({ uuid })
         }).then(() => {
           this.showApplyMessage = true;
diff --git a/src_assets/common/assets/web/troubleshooting.html b/src_assets/common/assets/web/troubleshooting.html
index 9c3cb688..2c48de29 100644
--- a/src_assets/common/assets/web/troubleshooting.html
+++ b/src_assets/common/assets/web/troubleshooting.html
@@ -205,7 +205,7 @@
           this.closeAppPressed = true;
           fetch("./api/apps/close", {
             credentials: 'include',
-            method: "POST"
+            method: 'POST'
           })
             .then((r) => r.json())
             .then((r) => {
@@ -226,7 +226,7 @@
           }, 5000);
           fetch("./api/restart", {
             credentials: 'include',
-            method: "POST",
+            method: 'POST',
           })
           .then((resp) => {
             if (resp.status !== 200) {
@@ -250,7 +250,7 @@
             this.serverQuitting = true;
             fetch("./api/quit", {
               credentials: 'include',
-              method: "POST",
+              method: 'POST',
             })
             .then(() => {
               this.serverQuitting = false;
@@ -267,7 +267,7 @@
           this.ddResetPressed = true;
           fetch("/api/reset-display-device-persistence", {
             credentials: 'include',
-            method: "POST"
+            method: 'POST'
           })
             .then((r) => r.json())
             .then((r) => {
diff --git a/src_assets/common/assets/web/welcome.html b/src_assets/common/assets/web/welcome.html
index e1775140..08103e34 100644
--- a/src_assets/common/assets/web/welcome.html
+++ b/src_assets/common/assets/web/welcome.html
@@ -81,7 +81,10 @@
         this.error = null;
         this.loading = true;
         fetch("./api/password", {
-          method: "POST",
+          headers: {
+            'Content-Type': 'application/json'
+          },
+          method: 'POST',
           body: JSON.stringify(this.passwordData),
         }).then((r) => {
           this.loading = false;