diff --git a/hecl/extern/athena b/hecl/extern/athena
index 3371af733..ed7161b7f 160000
--- a/hecl/extern/athena
+++ b/hecl/extern/athena
@@ -1 +1 @@
-Subproject commit 3371af733eb4dbc088ee3cc4a2c8bdcfca1e8f48
+Subproject commit ed7161b7f85563ad24e347cffd0fee3ddbe7da95
diff --git a/hecl/extern/boo b/hecl/extern/boo
index fa45c6750..25fadc734 160000
--- a/hecl/extern/boo
+++ b/hecl/extern/boo
@@ -1 +1 @@
-Subproject commit fa45c6750a0d9d876341017a7e2b4915afa90369
+Subproject commit 25fadc73481b5cbda6c1473c84a1b2c00ec3d468
diff --git a/hecl/include/hecl/BitVector.hpp b/hecl/include/hecl/BitVector.hpp
index 557e9e841..59e8905bc 100644
--- a/hecl/include/hecl/BitVector.hpp
+++ b/hecl/include/hecl/BitVector.hpp
@@ -192,7 +192,7 @@ public:
       if (idx + Length > size())
         return -1;
       bool good = true;
-      for (int i = 0; i < Length; ++i) {
+      for (unsigned i = 0; i < Length; ++i) {
         int ThisIdx = idx + i;
         if (!test(ThisIdx)) {
           good = false;