diff --git a/ports/otl/portfile.cmake b/ports/otl/portfile.cmake
index 6ec181db45..76234d4b4b 100644
--- a/ports/otl/portfile.cmake
+++ b/ports/otl/portfile.cmake
@@ -1,9 +1,9 @@
-set(OTL_VERSION 40490)
+set(OTL_VERSION 40491)
 
 vcpkg_download_distfile(ARCHIVE
     URLS "http://otl.sourceforge.net/otlv4_${OTL_VERSION}.zip"
     FILENAME "otlv4_${OTL_VERSION}.zip"
-    SHA512 bc22068d3789e6f20cd86ad6e547890ce24258dca25ef8b04e4476a534c90e244e3aad7a020727b268d472c9b30b5f30aea7f88c4f4bda7dcaffda3c4247a1c2
+    SHA512 11f6e11c2eb128dea5b6d1e9eef1f033deac02f7ed063e3709969f66963bf68162f06cb11332d14a2fe341df0fb28313be49ddac0b2264e7a10a624fe662e8b1
 )
 
 vcpkg_extract_source_archive(
diff --git a/ports/otl/vcpkg.json b/ports/otl/vcpkg.json
index b1459f2085..2e7eff9e7d 100644
--- a/ports/otl/vcpkg.json
+++ b/ports/otl/vcpkg.json
@@ -1,6 +1,6 @@
 {
   "name": "otl",
-  "version": "4.0.490",
+  "version": "4.0.491",
   "description": "Oracle, Odbc and DB2-CLI Template Library",
   "homepage": "https://otl.sourceforge.net/",
   "license": "ISC"
diff --git a/versions/baseline.json b/versions/baseline.json
index 782464a058..c28b2ea573 100644
--- a/versions/baseline.json
+++ b/versions/baseline.json
@@ -7221,7 +7221,7 @@
       "port-version": 0
     },
     "otl": {
-      "baseline": "4.0.490",
+      "baseline": "4.0.491",
       "port-version": 0
     },
     "outcome": {
diff --git a/versions/o-/otl.json b/versions/o-/otl.json
index c471bea5d8..be2497bb05 100644
--- a/versions/o-/otl.json
+++ b/versions/o-/otl.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "1599648151a781567250c9736b997bb9664c3d26",
+      "version": "4.0.491",
+      "port-version": 0
+    },
     {
       "git-tree": "7d6b80142f8dbd703f69553575d06c493451514a",
       "version": "4.0.490",