diff --git a/project/Docs.scala b/project/Docs.scala
index ac3107c06..d7616b02c 100644
--- a/project/Docs.scala
+++ b/project/Docs.scala
@@ -20,7 +20,7 @@ object Docs {
   // - src/nanoc/nanoc.yaml
   // - src/reference/template.properties
   lazy val targetSbtBinaryVersion = "1.x"
-  lazy val targetSbtFullVersion = "1.2.1"
+  lazy val targetSbtFullVersion = "1.2.3"
 
   lazy val siteEmail = settingKey[String]("")
 
diff --git a/project/build.properties b/project/build.properties
index 5620cc502..0cd8b0798 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.2.1
+sbt.version=1.2.3
diff --git a/src/nanoc/content/download.html b/src/nanoc/content/download.html
index b4e13a485..d0e0f9d84 100644
--- a/src/nanoc/content/download.html
+++ b/src/nanoc/content/download.html
@@ -62,6 +62,13 @@ <h3>Previous releases</h3>
 <h4>1.x</h4>
 <ul>
 
+<li>
+  sbt 1.2.3
+  (<a href="https://piccolo.link/sbt-1.2.3.zip">.zip</a>)
+  (<a href="https://piccolo.link/sbt-1.2.3.tgz">.tgz</a>)
+  (<a href="https://piccolo.link/sbt-1.2.3.msi">.msi</a>)
+</li>
+
 <li>
   sbt 1.2.1
   (<a href="https://piccolo.link/sbt-1.2.1.zip">.zip</a>)
diff --git a/src/nanoc/nanoc.yaml b/src/nanoc/nanoc.yaml
index c18e2929a..dd9565eee 100644
--- a/src/nanoc/nanoc.yaml
+++ b/src/nanoc/nanoc.yaml
@@ -1,8 +1,8 @@
-sbtVersion: 1.2.1
+sbtVersion: 1.2.3
 # Windows build version tends to be different from the rest
-windowsBuild: 1.2.1
+windowsBuild: 1.2.3
 
-sbtVersionForScalaDoc: 1.2.1
+sbtVersionForScalaDoc: 1.2.3
 
 sbtBinaryVersion: 1.0
 
diff --git a/src/reference/template.properties b/src/reference/template.properties
index e083f6610..33509b069 100644
--- a/src/reference/template.properties
+++ b/src/reference/template.properties
@@ -1,5 +1,5 @@
-app_version=1.2.1
-windows_app_version=1.2.1
+app_version=1.2.3
+windows_app_version=1.2.3
 
 color_scheme=github
 example_scala_version=2.12.6