diff --git a/CHANGELOG.md b/CHANGELOG.md
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@@ -1,5 +1,8 @@
 # 5.5.0
   - Changes from 5.4.0
+    - API:
+      - `osrm-datastore` now accepts the parameter `--max-wait` that specifies how long it waits before aquiring a shared memory lock by force
+      - Shared memory now allows for multiple clients (multiple instances of libosrm on the same segment)
     - Profiles
       - `restrictions` is now used for namespaced restrictions and restriction exceptions (e.g. `restriction:motorcar=` as well as `except=motorcar`)
       - replaced lhs/rhs profiles by using test defined profiles