diff --git a/RELEASE-NOTES b/RELEASE-NOTES
index 4e763a5..c1b7d90 100644
--- a/RELEASE-NOTES
+++ b/RELEASE-NOTES
@@ -1,3 +1,8 @@
+Version 0.2
+-----------
+
+- update sample run script, remove empty addresses from mempool
+
 Version 0.1
 ------------
 
diff --git a/samples/scripts/run b/samples/scripts/run
index fe28826..5bafc69 100755
--- a/samples/scripts/run
+++ b/samples/scripts/run
@@ -1,3 +1,3 @@
-#!/bin/sh
+j#!/bin/sh
 echo "Launching ElectrumX server..."
-exec 2>&1 envdir ./env /bin/sh -c 'envuidgid $USERNAME python3 $SERVER_MAIN'
+exec 2>&1 envdir ./env /bin/sh -c 'envuidgid $USERNAME python3 $ELECTRUMX'
diff --git a/server/block_processor.py b/server/block_processor.py
index 4ea5d55..94a4cf3 100644
--- a/server/block_processor.py
+++ b/server/block_processor.py
@@ -190,6 +190,8 @@ class MemPool(LoggedClass):
             hash168s.update(hash168 for hash168, value in txout_pairs)
             for hash168 in hash168s:
                 self.hash168s[hash168].remove(hex_hash)
+                if not self.hash168s[hash168]:
+                    del self.hash168s[hash168]
             touched.update(hash168s)
 
         # Get the raw transactions for the new hashes.  Ignore the
diff --git a/server/version.py b/server/version.py
index d8049bf..764e2d3 100644
--- a/server/version.py
+++ b/server/version.py
@@ -1 +1 @@
-VERSION = "ElectrumX 0.1"
+VERSION = "ElectrumX 0.2"