diff --git a/functions/src/household.ts b/functions/src/household.ts
index 4f7462b..09c6d3e 100644
--- a/functions/src/household.ts
+++ b/functions/src/household.ts
@@ -84,7 +84,7 @@ async function removeUidFromHousehold(
  * Der Besitzer kann seinen eigenen Haushalt nicht verlassen.
  */
 export const leaveHousehold = onCall(
-  {region: "europe-west3"},
+  {region: "europe-west3", enforceAppCheck: true},
   async (request) => {
     if (!request.auth) {
       throw new HttpsError("unauthenticated", "Anmeldung erforderlich.");
@@ -134,7 +134,7 @@ export const leaveHousehold = onCall(
  * Ein Mitglied aus dem eigenen Haushalt entfernen (nur der Besitzer).
  */
 export const removeMember = onCall(
-  {region: "europe-west3"},
+  {region: "europe-west3", enforceAppCheck: true},
   async (request) => {
     if (!request.auth) {
       throw new HttpsError("unauthenticated", "Anmeldung erforderlich.");
@@ -203,7 +203,7 @@ export const removeMember = onCall(
  * ändern dürfte. Codes sind einmalig verwendbar und 7 Tage gültig.
  */
 export const joinHousehold = onCall(
-  {region: "europe-west3"},
+  {region: "europe-west3", enforceAppCheck: true},
   async (request) => {
     if (!request.auth) {
       throw new HttpsError("unauthenticated", "Anmeldung erforderlich.");
diff --git a/functions/src/index.ts b/functions/src/index.ts
index bb6a612..065a0b8 100644
--- a/functions/src/index.ts
+++ b/functions/src/index.ts
@@ -159,6 +159,7 @@ interface DiagnosisResult {
 export const diagnosePlant = onCall(
   {
     region: "europe-west3",
+    enforceAppCheck: true,
     secrets: [anthropicApiKey],
     memory: "512MiB",
     timeoutSeconds: 120,
@@ -228,6 +229,7 @@ export const diagnosePlant = onCall(
 export const identifyPlant = onCall(
   {
     region: "europe-west3",
+    enforceAppCheck: true,
     secrets: [plantNetApiKey, anthropicApiKey],
     memory: "512MiB",
     timeoutSeconds: 120,
@@ -329,6 +331,7 @@ interface LocationAnalysis {
 export const analyzeLocation = onCall(
   {
     region: "europe-west3",
+    enforceAppCheck: true,
     secrets: [anthropicApiKey],
     memory: "512MiB",
     timeoutSeconds: 120,
@@ -379,6 +382,7 @@ interface PlantFitAssessment {
 export const assessPlantFit = onCall(
   {
     region: "europe-west3",
+    enforceAppCheck: true,
     secrets: [anthropicApiKey],
     memory: "512MiB",
     timeoutSeconds: 120,
diff --git a/ios/Runner.xcworkspace/xcshareddata/swiftpm/Package.resolved b/ios/Runner.xcworkspace/xcshareddata/swiftpm/Package.resolved
index c4a5293..5c3953c 100644
--- a/ios/Runner.xcworkspace/xcshareddata/swiftpm/Package.resolved
+++ b/ios/Runner.xcworkspace/xcshareddata/swiftpm/Package.resolved
@@ -23,8 +23,8 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/firebase/firebase-ios-sdk",
       "state" : {
-        "revision" : "42e81d245e30e49ea6a5830cf2842d44a1591270",
-        "version" : "12.15.0"
+        "revision" : "33a468adfdb75b53f05a37e7c886ca7c962b5c17",
+        "version" : "12.17.0"
       }
     },
     {
@@ -41,8 +41,8 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/google/GoogleAppMeasurement.git",
       "state" : {
-        "revision" : "144855f40d8668927f256a3045f7fdc4c3f4338b",
-        "version" : "12.15.0"
+        "revision" : "fceaffa07d22dcd5624d3639fd970351a4a5ad8c",
+        "version" : "12.17.0"
       }
     },
     {
@@ -116,6 +116,15 @@
         "revision" : "f4a19a3c313dc2616c70bb49d29a799fb16be837",
         "version" : "2.4.1"
       }
+    },
+    {
+      "identity" : "recaptcha-enterprise-mobile-sdk",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/GoogleCloudPlatform/recaptcha-enterprise-mobile-sdk.git",
+      "state" : {
+        "revision" : "85588690041e63784be7bcb4b631c32565127ba2",
+        "version" : "18.9.1"
+      }
     }
   ],
   "version" : 2