diff --git a/CMakeLists.txt b/CMakeLists.txt
index bf538038..701108cb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -34,8 +34,8 @@ project(
   LANGUAGES C
 )
 # set this to "${PROJECT_VERSION}" on release
-set(INSTALL_VERSION "${PROJECT_VERSION}")
-#set(INSTALL_VERSION "unreleased")
+#set(INSTALL_VERSION "${PROJECT_VERSION}")
+set(INSTALL_VERSION "unreleased")
 set(H3_CORE_VERSION 4.1.0)
 set(H3_CORE_SHA256 ec99f1f5974846bde64f4513cf8d2ea1b8d172d2218ab41803bf6a63532272bc)
 
diff --git a/h3/CMakeLists.txt b/h3/CMakeLists.txt
index ecbd18c5..f6b5d378 100644
--- a/h3/CMakeLists.txt
+++ b/h3/CMakeLists.txt
@@ -74,6 +74,7 @@ PostgreSQL_add_extension(postgresql_h3
     sql/updates/h3--4.1.1--4.1.2.sql
     sql/updates/h3--4.1.2--4.1.3.sql
     sql/updates/h3--4.1.3--4.1.4.sql
+    sql/updates/h3--4.1.4--unreleased.sql
 )
 
 # configure
diff --git a/h3/sql/updates/h3--4.1.4--unreleased.sql b/h3/sql/updates/h3--4.1.4--unreleased.sql
new file mode 100644
index 00000000..5763858f
--- /dev/null
+++ b/h3/sql/updates/h3--4.1.4--unreleased.sql
@@ -0,0 +1,18 @@
+/*
+ * Copyright 2024 Bytes & Brains
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+-- complain if script is sourced in psql, rather than via CREATE EXTENSION
+\echo Use "ALTER EXTENSION h3 UPDATE TO 'unreleased'" to load this file. \quit
diff --git a/h3_postgis/CMakeLists.txt b/h3_postgis/CMakeLists.txt
index ffe8d020..9861a5fa 100644
--- a/h3_postgis/CMakeLists.txt
+++ b/h3_postgis/CMakeLists.txt
@@ -36,6 +36,7 @@ PostgreSQL_add_extension(postgresql_h3_postgis
     sql/updates/h3_postgis--4.1.1--4.1.2.sql
     sql/updates/h3_postgis--4.1.2--4.1.3.sql
     sql/updates/h3_postgis--4.1.3--4.1.4.sql
+    sql/updates/h3_postgis--4.1.4--unreleased.sql
 )
 
 # link
diff --git a/h3_postgis/sql/updates/h3_postgis--4.1.4--unreleased.sql b/h3_postgis/sql/updates/h3_postgis--4.1.4--unreleased.sql
new file mode 100644
index 00000000..99ca965b
--- /dev/null
+++ b/h3_postgis/sql/updates/h3_postgis--4.1.4--unreleased.sql
@@ -0,0 +1,18 @@
+/*
+ * Copyright 2024 Bytes & Brains
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+-- complain if script is sourced in psql, rather than via CREATE EXTENSION
+\echo Use "ALTER EXTENSION h3_postgis UPDATE TO 'unreleased'" to load this file. \quit