diff --git a/mozaik_country_rest/__manifest__.py b/mozaik_country_rest/__manifest__.py
index 229f41046..2bb1dde8b 100644
--- a/mozaik_country_rest/__manifest__.py
+++ b/mozaik_country_rest/__manifest__.py
@@ -19,8 +19,8 @@
     "data": [],
     "external_dependencies": {
         "python": [
-            "extendable_pydantic",
-            "pydantic",
+            "extendable_pydantic<1",
+            "pydantic<2",
         ]
     },
 }
diff --git a/mozaik_distribution_list_rest/__manifest__.py b/mozaik_distribution_list_rest/__manifest__.py
index 9d3371e9a..6b6761a45 100644
--- a/mozaik_distribution_list_rest/__manifest__.py
+++ b/mozaik_distribution_list_rest/__manifest__.py
@@ -19,8 +19,8 @@
     "data": [],
     "external_dependencies": {
         "python": [
-            "extendable_pydantic",
-            "pydantic",
+            "extendable_pydantic<1",
+            "pydantic<2",
         ]
     },
 }
diff --git a/mozaik_document_rest/__manifest__.py b/mozaik_document_rest/__manifest__.py
index 78603efc9..da788498a 100644
--- a/mozaik_document_rest/__manifest__.py
+++ b/mozaik_document_rest/__manifest__.py
@@ -21,8 +21,8 @@
     "data": [],
     "external_dependencies": {
         "python": [
-            "extendable_pydantic",
-            "pydantic",
+            "extendable_pydantic<1",
+            "pydantic<2",
         ]
     },
 }
diff --git a/mozaik_event_rest/__manifest__.py b/mozaik_event_rest/__manifest__.py
index b4eba69a0..2cf4116e0 100644
--- a/mozaik_event_rest/__manifest__.py
+++ b/mozaik_event_rest/__manifest__.py
@@ -34,8 +34,8 @@
     "data": ["views/event_event.xml"],
     "external_dependencies": {
         "python": [
-            "extendable_pydantic",
-            "pydantic",
+            "extendable_pydantic<1",
+            "pydantic<2",
         ]
     },
 }
diff --git a/mozaik_involvement_rest/__manifest__.py b/mozaik_involvement_rest/__manifest__.py
index 82e571a96..8def70970 100644
--- a/mozaik_involvement_rest/__manifest__.py
+++ b/mozaik_involvement_rest/__manifest__.py
@@ -21,8 +21,8 @@
     "data": [],
     "external_dependencies": {
         "python": [
-            "extendable_pydantic",
-            "pydantic",
+            "extendable_pydantic<1",
+            "pydantic<2",
         ]
     },
 }
diff --git a/mozaik_mail_rest/__manifest__.py b/mozaik_mail_rest/__manifest__.py
index 429a26630..dc74774a7 100644
--- a/mozaik_mail_rest/__manifest__.py
+++ b/mozaik_mail_rest/__manifest__.py
@@ -19,8 +19,8 @@
     "data": [],
     "external_dependencies": {
         "python": [
-            "extendable_pydantic",
-            "pydantic",
+            "extendable_pydantic<1",
+            "pydantic<2",
         ]
     },
 }
diff --git a/mozaik_membership_rest/__manifest__.py b/mozaik_membership_rest/__manifest__.py
index c84b211b8..d1cfe07fe 100644
--- a/mozaik_membership_rest/__manifest__.py
+++ b/mozaik_membership_rest/__manifest__.py
@@ -30,8 +30,8 @@
     "data": [],
     "external_dependencies": {
         "python": [
-            "extendable_pydantic",
-            "pydantic",
+            "extendable_pydantic<1",
+            "pydantic<2",
         ]
     },
 }
diff --git a/mozaik_partner_rest/__manifest__.py b/mozaik_partner_rest/__manifest__.py
index cb716e7dc..5919b932d 100644
--- a/mozaik_partner_rest/__manifest__.py
+++ b/mozaik_partner_rest/__manifest__.py
@@ -26,8 +26,8 @@
     "data": [],
     "external_dependencies": {
         "python": [
-            "extendable_pydantic",
-            "pydantic",
+            "extendable_pydantic<1",
+            "pydantic<2",
         ]
     },
 }
diff --git a/mozaik_petition_rest/__manifest__.py b/mozaik_petition_rest/__manifest__.py
index 7462eef1c..d38641af9 100644
--- a/mozaik_petition_rest/__manifest__.py
+++ b/mozaik_petition_rest/__manifest__.py
@@ -23,8 +23,8 @@
     "data": ["views/petition_petition.xml"],
     "external_dependencies": {
         "python": [
-            "extendable_pydantic",
-            "pydantic",
+            "extendable_pydantic<1",
+            "pydantic<2",
         ]
     },
 }
diff --git a/mozaik_sponsorship_rest/__manifest__.py b/mozaik_sponsorship_rest/__manifest__.py
index 4d2aaf905..1fabd615f 100644
--- a/mozaik_sponsorship_rest/__manifest__.py
+++ b/mozaik_sponsorship_rest/__manifest__.py
@@ -18,7 +18,7 @@
     "demo": [],
     "external_dependencies": {
         "python": [
-            "pydantic",
+            "pydantic<2",
         ]
     },
 }
diff --git a/mozaik_survey_rest/__manifest__.py b/mozaik_survey_rest/__manifest__.py
index 0ac9c5aa0..ef5ac8f23 100644
--- a/mozaik_survey_rest/__manifest__.py
+++ b/mozaik_survey_rest/__manifest__.py
@@ -27,8 +27,8 @@
     "demo": [],
     "external_dependencies": {
         "python": [
-            "extendable_pydantic",
-            "pydantic",
+            "extendable_pydantic<1",
+            "pydantic<2",
         ]
     },
 }
diff --git a/mozaik_thesaurus_api/__manifest__.py b/mozaik_thesaurus_api/__manifest__.py
index 226b0a610..271cdcdbf 100644
--- a/mozaik_thesaurus_api/__manifest__.py
+++ b/mozaik_thesaurus_api/__manifest__.py
@@ -19,8 +19,8 @@
     "data": [],
     "external_dependencies": {
         "python": [
-            "extendable_pydantic",
-            "pydantic",
+            "extendable_pydantic<1",
+            "pydantic<2",
         ]
     },
 }
diff --git a/requirements.txt b/requirements.txt
index 802f6090f..985f27b4c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 # generated from manifests external_dependencies
-extendable_pydantic
+extendable_pydantic<1
 freezegun
 graphene
 openupgradelib
 phonenumbers
-pydantic
+pydantic<2