diff --git a/generate4.xml b/generate4.xml
index 1e081cb2..d6b8cebe 100644
--- a/generate4.xml
+++ b/generate4.xml
@@ -41,6 +41,7 @@
       <!-- <dependency name="rt" function="clock_gettime" system="linux" system_exclude="android" /> -->
       <!-- Arbitrary minimum version, current nuget package is v0.6.1. -->
       <dependency name="secp256k1" version="0.5.1.0" />
+      <dependency name="ultrafast" version="4.1.1.4" />
 
       <!-- General flags -->
       <flag name="std=c++20" comment="Require c++20 for all c++ products." context="c++" />
@@ -864,12 +865,15 @@
       <package compiler="vc145" name="libbitcoin-boost_url-vc145" version="1.91.0" />
     </resource>
     <resource canonical="secp256k1">
-      <!-- The vc120 secp256k1 nuget package is no longer supported -->
       <package compiler="vc141" name="secp256k1_vc141" version="0.1.0.20" />
       <package compiler="vc142" name="secp256k1_vc142" version="0.1.0.20" />
       <package compiler="vc143" name="secp256k1_vc143" version="0.6.1" />
       <package compiler="vc145" name="secp256k1_vc145" version="0.6.1.2" />
     </resource>
+    <resource canonical="ultrafast">
+      <package compiler="vc143" name="UltrafastSecp256k1-vc143" version="4.1.1.4" />
+      <package compiler="vc145" name="UltrafastSecp256k1-vc145" version="4.1.1.4" />
+    </resource>
   </nuget>
 
   <vs path="version4">
diff --git a/props/version4/project/libbitcoin-database/libbitcoin-database-test/libbitcoin-database-test.props b/props/version4/project/libbitcoin-database/libbitcoin-database-test/libbitcoin-database-test.props
index 8f9501d9..24a00872 100644
--- a/props/version4/project/libbitcoin-database/libbitcoin-database-test/libbitcoin-database-test.props
+++ b/props/version4/project/libbitcoin-database/libbitcoin-database-test/libbitcoin-database-test.props
@@ -50,6 +50,7 @@
 
   <Target Name="LinkageInfo" BeforeTargets="PrepareForBuild">
     <Message Text="Linkage-secp256k1 : $(Linkage-secp256k1)" Importance="high"/>
+    <Message Text="Linkage-ultrafast : $(Linkage-ultrafast)" Importance="high"/>
     <Message Text="Linkage-_system   : $(Linkage-libbitcoin-system)" Importance="high"/>
     <Message Text="Linkage-_database : $(Linkage-libbitcoin-database)" Importance="high"/>
   </Target>
diff --git a/props/version4/project/libbitcoin-database/libbitcoin-database-tools/libbitcoin-database-tools.props b/props/version4/project/libbitcoin-database/libbitcoin-database-tools/libbitcoin-database-tools.props
index b12204c9..e96ef6e2 100644
--- a/props/version4/project/libbitcoin-database/libbitcoin-database-tools/libbitcoin-database-tools.props
+++ b/props/version4/project/libbitcoin-database/libbitcoin-database-tools/libbitcoin-database-tools.props
@@ -47,6 +47,7 @@
 
   <Target Name="LinkageInfo" BeforeTargets="PrepareForBuild">
     <Message Text="Linkage-secp256k1 : $(Linkage-secp256k1)" Importance="high"/>
+    <Message Text="Linkage-ultrafast : $(Linkage-ultrafast)" Importance="high"/>
     <Message Text="Linkage-_system   : $(Linkage-libbitcoin-system)" Importance="high"/>
     <Message Text="Linkage-_database : $(Linkage-libbitcoin-database)" Importance="high"/>
   </Target>
diff --git a/props/version4/project/libbitcoin-database/libbitcoin-database/libbitcoin-database.props b/props/version4/project/libbitcoin-database/libbitcoin-database/libbitcoin-database.props
index 7c0796e4..411f4de3 100644
--- a/props/version4/project/libbitcoin-database/libbitcoin-database/libbitcoin-database.props
+++ b/props/version4/project/libbitcoin-database/libbitcoin-database/libbitcoin-database.props
@@ -46,6 +46,7 @@
 
   <Target Name="LinkageInfo" BeforeTargets="PrepareForBuild">
     <Message Text="Linkage-secp256k1 : $(Linkage-secp256k1)" Importance="high"/>
+    <Message Text="Linkage-ultrafast : $(Linkage-ultrafast)" Importance="high"/>
     <Message Text="Linkage-_system   : $(Linkage-libbitcoin-system)" Importance="high"/>
   </Target>
 
diff --git a/props/version4/project/libbitcoin-network/libbitcoin-network-test/libbitcoin-network-test.props b/props/version4/project/libbitcoin-network/libbitcoin-network-test/libbitcoin-network-test.props
index 4ce82f2b..875a033a 100644
--- a/props/version4/project/libbitcoin-network/libbitcoin-network-test/libbitcoin-network-test.props
+++ b/props/version4/project/libbitcoin-network/libbitcoin-network-test/libbitcoin-network-test.props
@@ -61,6 +61,7 @@
 
   <Target Name="LinkageInfo" BeforeTargets="PrepareForBuild">
     <Message Text="Linkage-secp256k1 : $(Linkage-secp256k1)" Importance="high"/>
+    <Message Text="Linkage-ultrafast : $(Linkage-ultrafast)" Importance="high"/>
     <Message Text="Linkage-_system   : $(Linkage-libbitcoin-system)" Importance="high"/>
     <Message Text="Linkage-_network  : $(Linkage-libbitcoin-network)" Importance="high"/>
   </Target>
diff --git a/props/version4/project/libbitcoin-network/libbitcoin-network/libbitcoin-network.props b/props/version4/project/libbitcoin-network/libbitcoin-network/libbitcoin-network.props
index 79d0ec24..8b805b9d 100644
--- a/props/version4/project/libbitcoin-network/libbitcoin-network/libbitcoin-network.props
+++ b/props/version4/project/libbitcoin-network/libbitcoin-network/libbitcoin-network.props
@@ -84,6 +84,7 @@
 
   <Target Name="LinkageInfo" BeforeTargets="PrepareForBuild">
     <Message Text="Linkage-secp256k1 : $(Linkage-secp256k1)" Importance="high"/>
+    <Message Text="Linkage-ultrafast : $(Linkage-ultrafast)" Importance="high"/>
     <Message Text="Linkage-_system   : $(Linkage-libbitcoin-system)" Importance="high"/>
   </Target>
 
diff --git a/props/version4/project/libbitcoin-node/bn/bn.props b/props/version4/project/libbitcoin-node/bn/bn.props
index db7ebe48..9448b880 100644
--- a/props/version4/project/libbitcoin-node/bn/bn.props
+++ b/props/version4/project/libbitcoin-node/bn/bn.props
@@ -55,6 +55,7 @@
 
   <Target Name="LinkageInfo" BeforeTargets="PrepareForBuild">
     <Message Text="Linkage-secp256k1 : $(Linkage-secp256k1)" Importance="high"/>
+    <Message Text="Linkage-ultrafast : $(Linkage-ultrafast)" Importance="high"/>
     <Message Text="Linkage-_system   : $(Linkage-libbitcoin-system)" Importance="high"/>
     <Message Text="Linkage-_database : $(Linkage-libbitcoin-database)" Importance="high"/>
     <Message Text="Linkage-_network  : $(Linkage-libbitcoin-network)" Importance="high"/>
diff --git a/props/version4/project/libbitcoin-node/libbitcoin-node-test/libbitcoin-node-test.props b/props/version4/project/libbitcoin-node/libbitcoin-node-test/libbitcoin-node-test.props
index 3b92d0f5..f488377c 100644
--- a/props/version4/project/libbitcoin-node/libbitcoin-node-test/libbitcoin-node-test.props
+++ b/props/version4/project/libbitcoin-node/libbitcoin-node-test/libbitcoin-node-test.props
@@ -57,6 +57,7 @@
 
   <Target Name="LinkageInfo" BeforeTargets="PrepareForBuild">
     <Message Text="Linkage-secp256k1 : $(Linkage-secp256k1)" Importance="high"/>
+    <Message Text="Linkage-ultrafast : $(Linkage-ultrafast)" Importance="high"/>
     <Message Text="Linkage-_system   : $(Linkage-libbitcoin-system)" Importance="high"/>
     <Message Text="Linkage-_database : $(Linkage-libbitcoin-database)" Importance="high"/>
     <Message Text="Linkage-_network  : $(Linkage-libbitcoin-network)" Importance="high"/>
diff --git a/props/version4/project/libbitcoin-node/libbitcoin-node/libbitcoin-node.props b/props/version4/project/libbitcoin-node/libbitcoin-node/libbitcoin-node.props
index 100424c8..6214b253 100644
--- a/props/version4/project/libbitcoin-node/libbitcoin-node/libbitcoin-node.props
+++ b/props/version4/project/libbitcoin-node/libbitcoin-node/libbitcoin-node.props
@@ -59,6 +59,7 @@
 
   <Target Name="LinkageInfo" BeforeTargets="PrepareForBuild">
     <Message Text="Linkage-secp256k1 : $(Linkage-secp256k1)" Importance="high"/>
+    <Message Text="Linkage-ultrafast : $(Linkage-ultrafast)" Importance="high"/>
     <Message Text="Linkage-_system   : $(Linkage-libbitcoin-system)" Importance="high"/>
     <Message Text="Linkage-_database : $(Linkage-libbitcoin-database)" Importance="high"/>
     <Message Text="Linkage-_network  : $(Linkage-libbitcoin-network)" Importance="high"/>
diff --git a/props/version4/project/libbitcoin-server/bs/bs.props b/props/version4/project/libbitcoin-server/bs/bs.props
index 5d4d73c3..ba867487 100644
--- a/props/version4/project/libbitcoin-server/bs/bs.props
+++ b/props/version4/project/libbitcoin-server/bs/bs.props
@@ -59,6 +59,7 @@
 
   <Target Name="LinkageInfo" BeforeTargets="PrepareForBuild">
     <Message Text="Linkage-secp256k1 : $(Linkage-secp256k1)" Importance="high"/>
+    <Message Text="Linkage-ultrafast : $(Linkage-ultrafast)" Importance="high"/>
     <Message Text="Linkage-_system   : $(Linkage-libbitcoin-system)" Importance="high"/>
     <Message Text="Linkage-_database : $(Linkage-libbitcoin-database)" Importance="high"/>
     <Message Text="Linkage-_node     : $(Linkage-libbitcoin-node)" Importance="high"/>
diff --git a/props/version4/project/libbitcoin-server/libbitcoin-server-test/libbitcoin-server-test.props b/props/version4/project/libbitcoin-server/libbitcoin-server-test/libbitcoin-server-test.props
index accd225f..895afc7b 100644
--- a/props/version4/project/libbitcoin-server/libbitcoin-server-test/libbitcoin-server-test.props
+++ b/props/version4/project/libbitcoin-server/libbitcoin-server-test/libbitcoin-server-test.props
@@ -61,6 +61,7 @@
 
   <Target Name="LinkageInfo" BeforeTargets="PrepareForBuild">
     <Message Text="Linkage-secp256k1 : $(Linkage-secp256k1)" Importance="high"/>
+    <Message Text="Linkage-ultrafast : $(Linkage-ultrafast)" Importance="high"/>
     <Message Text="Linkage-_system   : $(Linkage-libbitcoin-system)" Importance="high"/>
     <Message Text="Linkage-_database : $(Linkage-libbitcoin-database)" Importance="high"/>
     <Message Text="Linkage-_node     : $(Linkage-libbitcoin-node)" Importance="high"/>
diff --git a/props/version4/project/libbitcoin-server/libbitcoin-server/libbitcoin-server.props b/props/version4/project/libbitcoin-server/libbitcoin-server/libbitcoin-server.props
index 6727044f..d2794640 100644
--- a/props/version4/project/libbitcoin-server/libbitcoin-server/libbitcoin-server.props
+++ b/props/version4/project/libbitcoin-server/libbitcoin-server/libbitcoin-server.props
@@ -63,6 +63,7 @@
 
   <Target Name="LinkageInfo" BeforeTargets="PrepareForBuild">
     <Message Text="Linkage-secp256k1 : $(Linkage-secp256k1)" Importance="high"/>
+    <Message Text="Linkage-ultrafast : $(Linkage-ultrafast)" Importance="high"/>
     <Message Text="Linkage-_system   : $(Linkage-libbitcoin-system)" Importance="high"/>
     <Message Text="Linkage-_database : $(Linkage-libbitcoin-database)" Importance="high"/>
     <Message Text="Linkage-_network  : $(Linkage-libbitcoin-network)" Importance="high"/>
diff --git a/props/version4/project/libbitcoin-system/libbitcoin-system-examples/libbitcoin-system-examples.props b/props/version4/project/libbitcoin-system/libbitcoin-system-examples/libbitcoin-system-examples.props
index 02df845d..5847fe7d 100644
--- a/props/version4/project/libbitcoin-system/libbitcoin-system-examples/libbitcoin-system-examples.props
+++ b/props/version4/project/libbitcoin-system/libbitcoin-system-examples/libbitcoin-system-examples.props
@@ -43,6 +43,7 @@
 
   <Target Name="LinkageInfo" BeforeTargets="PrepareForBuild">
     <Message Text="Linkage-secp256k1 : $(Linkage-secp256k1)" Importance="high"/>
+    <Message Text="Linkage-ultrafast : $(Linkage-ultrafast)" Importance="high"/>
     <Message Text="Linkage-_system   : $(Linkage-libbitcoin-system)" Importance="high"/>
   </Target>
 
diff --git a/props/version4/project/libbitcoin-system/libbitcoin-system-test/libbitcoin-system-test.props b/props/version4/project/libbitcoin-system/libbitcoin-system-test/libbitcoin-system-test.props
index 135a0252..4de11796 100644
--- a/props/version4/project/libbitcoin-system/libbitcoin-system-test/libbitcoin-system-test.props
+++ b/props/version4/project/libbitcoin-system/libbitcoin-system-test/libbitcoin-system-test.props
@@ -54,6 +54,7 @@
 
   <Target Name="LinkageInfo" BeforeTargets="PrepareForBuild">
     <Message Text="Linkage-secp256k1 : $(Linkage-secp256k1)" Importance="high"/>
+    <Message Text="Linkage-ultrafast : $(Linkage-ultrafast)" Importance="high"/>
     <Message Text="Linkage-_system   : $(Linkage-libbitcoin-system)" Importance="high"/>
   </Target>
 
diff --git a/props/version4/project/libbitcoin-system/libbitcoin-system/libbitcoin-system.props b/props/version4/project/libbitcoin-system/libbitcoin-system/libbitcoin-system.props
index 310b4f60..5d6f09fd 100644
--- a/props/version4/project/libbitcoin-system/libbitcoin-system/libbitcoin-system.props
+++ b/props/version4/project/libbitcoin-system/libbitcoin-system/libbitcoin-system.props
@@ -83,6 +83,7 @@
 
   <Target Name="LinkageInfo" BeforeTargets="PrepareForBuild">
     <Message Text="Linkage-secp256k1 : $(Linkage-secp256k1)" Importance="high"/>
+    <Message Text="Linkage-ultrafast : $(Linkage-ultrafast)" Importance="high"/>
   </Target>
 
 </Project>