diff --git a/third_party/loguru b/third_party/loguru
index 83b6f3c3..c3f5b432 160000
--- a/third_party/loguru
+++ b/third_party/loguru
@@ -1 +1 @@
-Subproject commit 83b6f3c3d16e40453ec0d12d3baef42cd2f37c3b
+Subproject commit c3f5b432068effa566c5c8442a1a05fd794786e4
diff --git a/third_party/rapidjson b/third_party/rapidjson
index 17ae6ffa..87d4e07f 160000
--- a/third_party/rapidjson
+++ b/third_party/rapidjson
@@ -1 +1 @@
-Subproject commit 17ae6ffa857173c25708e61610121bc908c0a6cd
+Subproject commit 87d4e07ffd0fb2603661243b43bdcb647a070aa0
diff --git a/third_party/sparsepp b/third_party/sparsepp
index bfb0de71..605ebb95 160000
--- a/third_party/sparsepp
+++ b/third_party/sparsepp
@@ -1 +1 @@
-Subproject commit bfb0de71ee7fa12a5f12c3ef61ce9f1d6d86d907
+Subproject commit 605ebb953425b1cdd15d1f9d72c67ca2b57f6d43
diff --git a/wscript b/wscript
index 701ced86..e74d643b 100644
--- a/wscript
+++ b/wscript
@@ -232,6 +232,8 @@ def build(bld):
   elif sys.platform.startswith('freebsd'):
     # loguru::stacktrace_as_stdstring calls backtrace_symbols
     lib.append('execinfo')
+    # sparsepp/spp_memory.h uses libkvm
+    lib.append('kvm')
 
     lib.append('pthread')
     lib.append('thr')