diff --git a/.gitmodules b/.gitmodules
index 7045f056d998191365607ad8155caa486aa11b61..d3c26ccb903d2d8ccd29aca2ebd8d92380ec38bb 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -73,3 +73,6 @@
 [submodule "libdap-stream-ch-chain-net"]
 	path = libdap-stream-ch-chain-net
 	url = https://gitlab.demlabs.net/cellframe/libdap-stream-ch-chain-net.git
+[submodule "libdap-server-http-db"]
+	path = libdap-server-http-db
+	url = http://gitlab.demlabs.net/cellframe/libdap-server-http-db.git
diff --git a/libdap-chain b/libdap-chain
index f7e22487b7c01431161bc527269e76e16e213cfd..d7166bf173223fb027d248ccb7c2df7288a8433b 160000
--- a/libdap-chain
+++ b/libdap-chain
@@ -1 +1 @@
-Subproject commit f7e22487b7c01431161bc527269e76e16e213cfd
+Subproject commit d7166bf173223fb027d248ccb7c2df7288a8433b
diff --git a/libdap-chain-net b/libdap-chain-net
index 10e82c5393eee63eff349b4f4d2ec932e66c57bf..c285d7ca6385dd480b0168c5a7e380b85e0327db 160000
--- a/libdap-chain-net
+++ b/libdap-chain-net
@@ -1 +1 @@
-Subproject commit 10e82c5393eee63eff349b4f4d2ec932e66c57bf
+Subproject commit c285d7ca6385dd480b0168c5a7e380b85e0327db
diff --git a/libdap-server-core-python b/libdap-server-core-python
index f6f2041893f5bf0a9ffccbdf8d94d25fec8987c0..fa0c59dac96fe133b53c56c6f6c5f1473566fc9e 160000
--- a/libdap-server-core-python
+++ b/libdap-server-core-python
@@ -1 +1 @@
-Subproject commit f6f2041893f5bf0a9ffccbdf8d94d25fec8987c0
+Subproject commit fa0c59dac96fe133b53c56c6f6c5f1473566fc9e
diff --git a/libdap-server-http-db b/libdap-server-http-db
new file mode 160000
index 0000000000000000000000000000000000000000..f3f0b0ed919d37368e86210940ebb9de686879a1
--- /dev/null
+++ b/libdap-server-http-db
@@ -0,0 +1 @@
+Subproject commit f3f0b0ed919d37368e86210940ebb9de686879a1
diff --git a/libdap-stream-ch-chain b/libdap-stream-ch-chain
index d614be3773d73516d7f56f3f439232a3a09539d7..5dcf99b114a8fc1b48d124feba528e0b9f413cd1 160000
--- a/libdap-stream-ch-chain
+++ b/libdap-stream-ch-chain
@@ -1 +1 @@
-Subproject commit d614be3773d73516d7f56f3f439232a3a09539d7
+Subproject commit 5dcf99b114a8fc1b48d124feba528e0b9f413cd1