diff --git a/Projects/AnalysisBase/externals.txt b/Projects/AnalysisBase/externals.txt
index b6eea38576bafd3f6c0b9acba3f5ef0d8737405e..a528feb2202e19c662fe3076a05f50d68b508234 100644
--- a/Projects/AnalysisBase/externals.txt
+++ b/Projects/AnalysisBase/externals.txt
@@ -6,5 +6,4 @@
 # forbidden.
 
 # The version of atlas/atlasexternals to use:
-AnalysisBaseExternalsVersion = 8643cbb2
-
+AnalysisBaseExternalsVersion = c1f3ff2a
diff --git a/Projects/AnalysisTop/externals.txt b/Projects/AnalysisTop/externals.txt
index 59f0188418445afd159f1ef525bd38386c52548b..e15c14b0081c093bb13d14ba4c87e9a292b0dc1f 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 = 8643cbb2
+AnalysisBaseExternalsVersion = c1f3ff2a
diff --git a/Projects/AthSimulation/externals.txt b/Projects/AthSimulation/externals.txt
index c0305844cdf746ce2250ef5980b590b465842a01..dd40f4f13ea6da1aed3e1bf929023fccfbd75430 100644
--- a/Projects/AthSimulation/externals.txt
+++ b/Projects/AthSimulation/externals.txt
@@ -6,7 +6,7 @@
 # forbidden.
 
 # The version of atlas/atlasexternals to use:
-AthSimulationExternalsVersion = 8643cbb2
+AthSimulationExternalsVersion = c1f3ff2a
 
 # The version of atlas/Gaudi to use:
 GaudiVersion = v28r2.011
diff --git a/Projects/Athena/externals.txt b/Projects/Athena/externals.txt
index 4a6dd79fc727d1c28b4f2e3be566865e779a2a0c..df0c151a3a387821ca2b1d247332bc09668b930b 100644
--- a/Projects/Athena/externals.txt
+++ b/Projects/Athena/externals.txt
@@ -6,7 +6,7 @@
 # forbidden.
 
 # The version of atlas/atlasexternals to use:
-AthenaExternalsVersion = 8643cbb2
+AthenaExternalsVersion = c1f3ff2a
 
 # The version of atlas/Gaudi to use:
 GaudiVersion = v28r2.011