diff --git a/Projects/AnalysisBase/externals.txt b/Projects/AnalysisBase/externals.txt
index 1a2ed4a89d404585946d41d7963faeb38d8dfc18..306ca6148f51731fd34e13379593b039b2583ca0 100644
--- a/Projects/AnalysisBase/externals.txt
+++ b/Projects/AnalysisBase/externals.txt
@@ -6,4 +6,4 @@
 # forbidden.
 
 # The version of atlas/atlasexternals to use:
-AnalysisBaseExternalsVersion = cf960f79
+AnalysisBaseExternalsVersion = 81ea37fe
diff --git a/Projects/AnalysisTop/externals.txt b/Projects/AnalysisTop/externals.txt
index a63308917d5ca15407a252201d873149ef7a2481..b1b9df96eace95284dc4f5cd2420fd7757d53efd 100644
--- a/Projects/AnalysisTop/externals.txt
+++ b/Projects/AnalysisTop/externals.txt
@@ -1,4 +1,4 @@
 # Versions of the various externals to build before starting the build of
 # this project, when doing a full stack nightly build.
 
-AnalysisBaseExternalsVersion = cf960f79
+AnalysisBaseExternalsVersion = 81ea37fe
diff --git a/Projects/AthSimulation/externals.txt b/Projects/AthSimulation/externals.txt
index ceab0c39873101dab947384b8b6275820b6170ad..79e6e5dd4f3fd091f1ccbd2140f4973c9854611f 100644
--- a/Projects/AthSimulation/externals.txt
+++ b/Projects/AthSimulation/externals.txt
@@ -6,7 +6,7 @@
 # forbidden.
 
 # The version of atlas/atlasexternals to use:
-AthSimulationExternalsVersion = cf960f79
+AthSimulationExternalsVersion = 81ea37fe
 
 # The version of atlas/Gaudi to use:
 GaudiVersion = v29r0.001
diff --git a/Projects/Athena/externals.txt b/Projects/Athena/externals.txt
index 0395e9adff2312a832163c700da947ed4c1e7de1..f3efea7d7fddc70d3e45f27fc93561c26935f769 100644
--- a/Projects/Athena/externals.txt
+++ b/Projects/Athena/externals.txt
@@ -6,7 +6,7 @@
 # forbidden.
 
 # The version of atlas/atlasexternals to use:
-AthenaExternalsVersion = cf960f79
+AthenaExternalsVersion = 81ea37fe
 
 # The version of atlas/Gaudi to use: 
 GaudiVersion = v29r0.002