diff --git a/seastar b/seastar
index e708d1df3a..92365e7b87 160000
--- a/seastar
+++ b/seastar
@@ -1 +1 @@
-Subproject commit e708d1df3a176081c3c478cd8b2f9e05f220154b
+Subproject commit 92365e7b87a8cc9506b57a9c6ea4db675dbbc64d
diff --git a/tools/toolchain/image b/tools/toolchain/image
index 694a9895d6..52968bb67d 100644
--- a/tools/toolchain/image
+++ b/tools/toolchain/image
@@ -1 +1 @@
-docker.io/scylladb/scylla-toolchain:fedora-31-20200427
+docker.io/scylladb/scylla-toolchain:fedora-31-20200512
diff --git a/utils/loading_shared_values.hh b/utils/loading_shared_values.hh
index 2f71f15ce0..1404baf4e8 100644
--- a/utils/loading_shared_values.hh
+++ b/utils/loading_shared_values.hh
@@ -27,6 +27,7 @@
 #include <seastar/core/shared_ptr.hh>
 #include <seastar/core/future.hh>
 #include <seastar/core/bitops.hh>
+#include <seastar/util/gcc6-concepts.hh>
 #include <boost/intrusive/unordered_set.hpp>
 #include <boost/iterator/transform_iterator.hpp>
 #include <boost/lambda/bind.hpp>