diff --git a/optimade.rst b/optimade.rst
index 472d61dbd..9c0f49457 100644
--- a/optimade.rst
+++ b/optimade.rst
@@ -1,6 +1,6 @@
-=================================
-OPTIMADE API specification v1.1.0
-=================================
+=========================================
+OPTIMADE API specification v1.1.0~develop
+=========================================
 
 .. comment
 
diff --git a/schemas/index_openapi_schema.json b/schemas/index_openapi_schema.json
index 9fc7609b0..8eb692156 100644
--- a/schemas/index_openapi_schema.json
+++ b/schemas/index_openapi_schema.json
@@ -3,7 +3,7 @@
   "info": {
     "title": "OPTIMADE API - Index meta-database",
     "description": "The [Open Databases Integration for Materials Design (OPTIMADE) consortium](https://www.optimade.org/) aims to make materials databases interoperational by developing a common REST API.\nThis is the \"special\" index meta-database.\n\nThis specification is generated using [`optimade-python-tools`](https://github.com/Materials-Consortia/optimade-python-tools/tree/v0.16.0) v0.16.0.",
-    "version": "1.1.0"
+    "version": "1.1.0~develop"
   },
   "paths": {
     "/info": {
diff --git a/schemas/openapi_schema.json b/schemas/openapi_schema.json
index 7270010d4..5eda933b9 100644
--- a/schemas/openapi_schema.json
+++ b/schemas/openapi_schema.json
@@ -3,7 +3,7 @@
   "info": {
     "title": "OPTIMADE API",
     "description": "The [Open Databases Integration for Materials Design (OPTIMADE) consortium](https://www.optimade.org/) aims to make materials databases interoperational by developing a common REST API.\n\nThis specification is generated using [`optimade-python-tools`](https://github.com/Materials-Consortia/optimade-python-tools/tree/v0.16.0) v0.16.0.",
-    "version": "1.1.0"
+    "version": "1.1.0~develop"
   },
   "paths": {
     "/info": {