diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2b6871e32..e0be5fea4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -14,7 +14,7 @@ include(EthPolicy)
 eth_policy()
 
 # project name and version should be set after cmake_policy CMP0048
-project(cpp-ethereum VERSION "1.2.0")
+project(cpp-ethereum VERSION "1.2.1")
 
 include(EthCompilerSettings)
 
diff --git a/alethzero b/alethzero
index 785fc5e1f..2ce12f938 160000
--- a/alethzero
+++ b/alethzero
@@ -1 +1 @@
-Subproject commit 785fc5e1fa59cb6ed69d96f8bb27ac8cf35db437
+Subproject commit 2ce12f938378661da4820534d235bcbd06503bf5
diff --git a/dependency_graph/generate.py b/dependency_graph/generate.py
index 47a552aae..387ac92a0 100755
--- a/dependency_graph/generate.py
+++ b/dependency_graph/generate.py
@@ -158,10 +158,17 @@ def processUmbrella(root):
 print "    }"
 print '    "base" -> "boost"'
 print '    "base" -> "Jsoncpp"'
+print '    "base" -> "json_spirit"'
 print '    "base" -> "LevelDB"'
 print '    "base" -> "pthreads"'
 print '    "secp256k1" -> "gmp"'
 
+# Hard-coded dependencies for 'libaleth', which doesn't have a UseAleth.cmake
+# to go with it, because the library is only used by the Aleth* applications,
+# and is not exposed to other applications.
+print '    "AlethZero" -> "aleth"'
+print '    "AlethOne" -> "aleth"'
+
 processUmbrella('..')
 
 print "}"
diff --git a/libethereum b/libethereum
index 45582db08..1b72dc785 160000
--- a/libethereum
+++ b/libethereum
@@ -1 +1 @@
-Subproject commit 45582db08ca37e5df9399a96df4dd9fbea2f4763
+Subproject commit 1b72dc785901da23f225e02de6a61cb272386f9b
diff --git a/libweb3core b/libweb3core
index d6093a980..e641c737d 160000
--- a/libweb3core
+++ b/libweb3core
@@ -1 +1 @@
-Subproject commit d6093a9802a5a29db114f06ad21076c8df266dbb
+Subproject commit e641c737d922ed8ee9ac2b64bc5228c58b9c93b9
diff --git a/mix b/mix
index 8bbca88b0..9f6fb2f58 160000
--- a/mix
+++ b/mix
@@ -1 +1 @@
-Subproject commit 8bbca88b0ec1581ec238d96d2de9590c2ddba8f1
+Subproject commit 9f6fb2f582079c7bffb54f8a61343775ca50d186
diff --git a/solidity b/solidity
index 8339330ba..02bb315d9 160000
--- a/solidity
+++ b/solidity
@@ -1 +1 @@
-Subproject commit 8339330ba3d3ae5c3c84a686586e73cdc46b6eaa
+Subproject commit 02bb315d9412b3c67fe6f24a072701439d4ddbec
diff --git a/web3.js b/web3.js
index ed0431c00..9642608f5 160000
--- a/web3.js
+++ b/web3.js
@@ -1 +1 @@
-Subproject commit ed0431c00ba2a16fc5253a78a4e4acfb56e7322e
+Subproject commit 9642608f51ac82b9f7a286a092c3f4b02d410288
diff --git a/webthree b/webthree
index 60f9147f0..1b54e3dec 160000
--- a/webthree
+++ b/webthree
@@ -1 +1 @@
-Subproject commit 60f9147f0089458d1f83d77d1964b28dba801c84
+Subproject commit 1b54e3dec34f6a43a196e000c6cd9cd41019cc39
diff --git a/webthree-helpers b/webthree-helpers
index f4ea3cc99..8b5416a91 160000
--- a/webthree-helpers
+++ b/webthree-helpers
@@ -1 +1 @@
-Subproject commit f4ea3cc99376db1d4d03e5aafbcaa78053544c0d
+Subproject commit 8b5416a910d8cb18916fa00758cd937f98199004