diff --git a/app/apps/api/serializers/accounts.py b/app/apps/api/serializers/accounts.py
index 880c03c..afd59b1 100644
--- a/app/apps/api/serializers/accounts.py
+++ b/app/apps/api/serializers/accounts.py
@@ -1,4 +1,5 @@
 from rest_framework import serializers
+from rest_framework.permissions import IsAuthenticated
 
 from apps.api.serializers.currencies import CurrencySerializer
 from apps.accounts.models import AccountGroup, Account
@@ -6,6 +7,8 @@ from apps.currencies.models import Currency
 
 
 class AccountGroupSerializer(serializers.ModelSerializer):
+    permission_classes = [IsAuthenticated]
+
     class Meta:
         model = AccountGroup
         fields = "__all__"
@@ -31,6 +34,8 @@ class AccountSerializer(serializers.ModelSerializer):
         allow_null=True,
     )
 
+    permission_classes = [IsAuthenticated]
+
     class Meta:
         model = Account
         fields = [
diff --git a/app/apps/api/serializers/currencies.py b/app/apps/api/serializers/currencies.py
index 2d56ff0..33ed84a 100644
--- a/app/apps/api/serializers/currencies.py
+++ b/app/apps/api/serializers/currencies.py
@@ -1,8 +1,12 @@
 from rest_framework import serializers
+from rest_framework.permissions import IsAuthenticated
+
 from apps.currencies.models import Currency, ExchangeRate
 
 
 class CurrencySerializer(serializers.ModelSerializer):
+    permission_classes = [IsAuthenticated]
+
     class Meta:
         model = Currency
         fields = "__all__"
@@ -24,6 +28,8 @@ class ExchangeRateSerializer(serializers.ModelSerializer):
         queryset=Currency.objects.all(), source="to_currency", write_only=True
     )
 
+    permission_classes = [IsAuthenticated]
+
     class Meta:
         model = ExchangeRate
         fields = "__all__"
diff --git a/app/apps/api/serializers/dca.py b/app/apps/api/serializers/dca.py
index 49a0b28..848d3e0 100644
--- a/app/apps/api/serializers/dca.py
+++ b/app/apps/api/serializers/dca.py
@@ -1,4 +1,6 @@
 from rest_framework import serializers
+from rest_framework.permissions import IsAuthenticated
+
 from apps.dca.models import DCAEntry, DCAStrategy
 
 
@@ -16,6 +18,8 @@ class DCAEntrySerializer(serializers.ModelSerializer):
         max_digits=42, decimal_places=30, read_only=True
     )
 
+    permission_classes = [IsAuthenticated]
+
     class Meta:
         model = DCAEntry
         fields = [
@@ -57,6 +61,8 @@ class DCAStrategySerializer(serializers.ModelSerializer):
         max_digits=42, decimal_places=30, read_only=True
     )
 
+    permission_classes = [IsAuthenticated]
+
     class Meta:
         model = DCAStrategy
         fields = [