diff --git a/README.org b/README.org
index 73b451cf8729b3a5ca600758f0b2748796041e2a..153c628ad34b6131356dc13af1385cca0b736209 100644
--- a/README.org
+++ b/README.org
@@ -18,9 +18,10 @@ if you want to be involved.
 
 * API compatibility
 
-| Client version | API version |
-|-------------+-------------|
-|         0.x |         3.x |
+| Client version | API version  |
+|----------------+--------------|
+|            0.x | 3.x (stable) |
+|            1.x | 4.x (sid)    |
 
 
 * Thanks
diff --git a/README.rst b/README.rst
index abf06277857003295fa9f64a406e1a62aa46e7bc..6c8dab4c8c295eab356dee2cfd7b6297f3072aaa 100644
--- a/README.rst
+++ b/README.rst
@@ -17,11 +17,13 @@ resources interactively using the embedded shell.
 
 .. table::
 
-    +----------------+-------------+
-    | Client version | API version |
-    +================+=============+
-    |            0.x |         3.x |
-    +----------------+-------------+
+    +----------------+--------------+
+    | Client version | API version  |
+    +================+==============+
+    |            0.x | 3.x (stable) |
+    +----------------+--------------+
+    |            1.x | 4.x (sid)    |
+    +----------------+--------------+
 
 2 Thanks
 --------