diff --git a/scripts/pi-hole/js/footer.js b/scripts/pi-hole/js/footer.js
index 6cd7bfba..70bc1d39 100644
--- a/scripts/pi-hole/js/footer.js
+++ b/scripts/pi-hole/js/footer.js
@@ -119,11 +119,10 @@ function piholeChange(action, duration) {
   $.ajax({
     url: "/api/dns/blocking",
     method: "POST",
-    dataType: "json",
-    data: {
+    data: JSON.stringify({
       blocking: action === "enable",
       timer: parseInt(duration, 10) > 0 ? parseInt(duration, 10) : null,
-    },
+    }),
   })
     .done(function (data) {
       if (data.blocking === action + "d") {
diff --git a/scripts/pi-hole/js/groups-adlists.js b/scripts/pi-hole/js/groups-adlists.js
index 624972b3..84ff709c 100644
--- a/scripts/pi-hole/js/groups-adlists.js
+++ b/scripts/pi-hole/js/groups-adlists.js
@@ -516,7 +516,7 @@ function addAdlist(event) {
     url: "/api/lists",
     method: "post",
     dataType: "json",
-    data: { address: address, comment: comment, type: type },
+    data: JSON.stringify({ address: address, comment: comment, type: type }),
     success: function () {
       utils.enableAll();
       utils.showAlert("success", "fas fa-plus", "Successfully added " + type + "list", address);
@@ -582,12 +582,12 @@ function editAdlist() {
     url: "/api/lists/" + encodeURIComponent(addressDecoded),
     method: "put",
     dataType: "json",
-    data: {
+    data: JSON.stringify({
       groups: groups,
       comment: comment,
       enabled: enabled,
       type: type,
-    },
+    }),
     success: function () {
       utils.enableAll();
       utils.showAlert(
diff --git a/scripts/pi-hole/js/groups-clients.js b/scripts/pi-hole/js/groups-clients.js
index 6a7aecef..843be7b9 100644
--- a/scripts/pi-hole/js/groups-clients.js
+++ b/scripts/pi-hole/js/groups-clients.js
@@ -440,7 +440,7 @@ function addClient() {
     url: "/api/clients",
     method: "post",
     dataType: "json",
-    data: { client: ip, comment: comment },
+    data: JSON.stringify({ client: ip, comment: comment }),
     success: function () {
       utils.enableAll();
       utils.showAlert("success", "fas fa-plus", "Successfully added client", ip);
@@ -495,12 +495,12 @@ function editClient() {
     url: "/api/clients/" + encodeURIComponent(clientDecoded),
     method: "put",
     dataType: "json",
-    data: {
+    data: JSON.stringify({
       client: client,
       groups: groups,
       comment: comment,
       enabled: enabled,
-    },
+    }),
     success: function () {
       utils.enableAll();
       utils.showAlert(
diff --git a/scripts/pi-hole/js/groups-domains.js b/scripts/pi-hole/js/groups-domains.js
index 8158caf8..1429a95a 100644
--- a/scripts/pi-hole/js/groups-domains.js
+++ b/scripts/pi-hole/js/groups-domains.js
@@ -527,12 +527,12 @@ function addDomain() {
     url: "/api/domains/" + type + "/" + kind,
     method: "post",
     dataType: "json",
-    data: {
+    data: JSON.stringify({
       domain: domain,
       comment: comment,
       type: type,
       kind: kind,
-    },
+    }),
     success: function () {
       utils.enableAll();
       utils.showAlert("success", "fas fa-plus", "Successfully added domain", domain);
@@ -609,13 +609,13 @@ function editDomain() {
     url: "/api/domains/" + newTypestr + "/" + encodeURIComponent(domainDecoded),
     method: "put",
     dataType: "json",
-    data: {
+    data: JSON.stringify({
       groups: groups,
       comment: comment,
       enabled: enabled,
       type: oldType,
       kind: oldKind,
-    },
+    }),
     success: function () {
       utils.enableAll();
       utils.showAlert(
diff --git a/scripts/pi-hole/js/groups.js b/scripts/pi-hole/js/groups.js
index 5e8f9930..0beab5ba 100644
--- a/scripts/pi-hole/js/groups.js
+++ b/scripts/pi-hole/js/groups.js
@@ -294,11 +294,11 @@ function addGroup() {
     url: "/api/groups",
     method: "post",
     dataType: "json",
-    data: {
+    data: JSON.stringify({
       name: name,
       comment: comment,
       enabled: true,
-    },
+    }),
     success: function () {
       utils.enableAll();
       utils.showAlert("success", "fas fa-plus", "Successfully added group", name);
@@ -360,11 +360,11 @@ function editGroup() {
     url: "/api/groups/" + oldName,
     method: "put",
     dataType: "json",
-    data: {
+    data: JSON.stringify({
       name: name,
       comment: comment,
       enabled: enabled,
-    },
+    }),
     success: function () {
       utils.enableAll();
       utils.showAlert("success", "fas fa-pencil-alt", "Successfully " + done + " group", oldName);
diff --git a/scripts/pi-hole/js/login.js b/scripts/pi-hole/js/login.js
index 4dc518f4..3f402841 100644
--- a/scripts/pi-hole/js/login.js
+++ b/scripts/pi-hole/js/login.js
@@ -60,8 +60,7 @@ function doLogin(password) {
   $.ajax({
     url: "/api/auth",
     method: "POST",
-    dataType: "json",
-    data: { password: password, totp: parseInt($("#totp").val(), 10) },
+    data: JSON.stringify({ password: password, totp: parseInt($("#totp").val(), 10) }),
   })
     .done(function () {
       wrongPassword(false, true);
diff --git a/scripts/pi-hole/js/settings-api.js b/scripts/pi-hole/js/settings-api.js
index 6bb17f67..b0e4fea2 100644
--- a/scripts/pi-hole/js/settings-api.js
+++ b/scripts/pi-hole/js/settings-api.js
@@ -318,8 +318,7 @@ function setTOTPSecret(secret) {
   $.ajax({
     url: "/api/config",
     type: "PATCH",
-    dataType: "json",
-    data: { config: { webserver: { api: { totp_secret: secret } } } },
+    data: JSON.stringify({ config: { webserver: { api: { totp_secret: secret } } } }),
     contentType: "application/json",
   })
     .done(function () {
diff --git a/scripts/pi-hole/js/settings.js b/scripts/pi-hole/js/settings.js
index b7ef7265..6922cdbb 100644
--- a/scripts/pi-hole/js/settings.js
+++ b/scripts/pi-hole/js/settings.js
@@ -137,8 +137,7 @@ function saveSettings() {
   $.ajax({
     url: "/api/config",
     method: "PATCH",
-    dataType: "json",
-    data: { config: settings },
+    data: JSON.stringify({ config: settings }),
     contentType: "application/json; charset=utf-8",
   })
     .done(function () {
diff --git a/scripts/pi-hole/js/utils.js b/scripts/pi-hole/js/utils.js
index 530725ab..cbeb6304 100644
--- a/scripts/pi-hole/js/utils.js
+++ b/scripts/pi-hole/js/utils.js
@@ -315,12 +315,12 @@ function addFromQueryLog(domain, list) {
       url: "/api/domains/" + list + "/exact",
       method: "post",
       dataType: "json",
-      data: {
+      data: JSON.stringify({
         domain: domain,
         comment: "Added from Query Log",
         type: list,
         kind: "exact",
-      },
+      }),
       success: function (response) {
         alProcessing.hide();
         if ("domains" in response && response.domains.length > 0) {