diff --git a/CHANGES.md b/CHANGES.md
index 3d8e867..816008f 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,9 @@
 # `bw_processing` Changelog
 
+# [1.0] - 2024-08-19
+
+* Move default indices type to 64 bit integers
+
 ### [0.9.6] - 2024-07-02
 
 * [PR #68: replace `np.NaN` by `np.nan`](https://github.com/brightway-lca/bw_processing/pull/68)
diff --git a/bw_processing/__init__.py b/bw_processing/__init__.py
index d0973cd..9db52b4 100644
--- a/bw_processing/__init__.py
+++ b/bw_processing/__init__.py
@@ -26,7 +26,7 @@
     "UndefinedInterface",
 )
 
-__version__ = "0.9.6"
+__version__ = "1.0"
 
 
 from .array_creation import create_array, create_structured_array