diff --git a/README.md b/README.md
index 17619320..8af786a8 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@
         </td>
         <td style="text-align: center;"><a href="demo/c/">Examples</a></td>
         <td style="text-align: center;">
-            <div><a href="source/c/"><img src="https://img.shields.io/badge/C%20%2f%20C%2b%2b-v2.1.17-blue" /></a></div>
+            <div><a href="source/c/"><img src="https://img.shields.io/badge/C%20%2f%20C%2b%2b-v2.1.18-blue" /></a></div>
             <div><a href="source/c/">Code &amp; Docs</a></div>
         </td>
     </tr>
diff --git a/generate/version.txt b/generate/version.txt
index 2f1a5aa9..d3026563 100644
--- a/generate/version.txt
+++ b/generate/version.txt
@@ -1 +1 @@
-2.1.17
+2.1.18
diff --git a/source/csharp/astronomy.csproj b/source/csharp/astronomy.csproj
index f08536f1..13f0e2f4 100644
--- a/source/csharp/astronomy.csproj
+++ b/source/csharp/astronomy.csproj
@@ -4,7 +4,7 @@
       <GenerateDocumentationFile>true</GenerateDocumentationFile>
       <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
       <PackageId>CosineKitty.AstronomyEngine</PackageId>
-      <PackageVersion>2.1.17</PackageVersion>
+      <PackageVersion>2.1.18</PackageVersion>
       <RepositoryUrl>https://github.com/cosinekitty/astronomy</RepositoryUrl>
       <Authors>Don Cross</Authors>
       <Title>Astronomy Engine</Title>
diff --git a/source/js/package.json b/source/js/package.json
index 1ff7645c..f76b9790 100644
--- a/source/js/package.json
+++ b/source/js/package.json
@@ -1,6 +1,6 @@
 {
   "name": "astronomy-engine",
-  "version": "2.1.17",
+  "version": "2.1.18",
   "description": "Astronomy calculation for Sun, Moon, and planets.",
   "author": "Donald Cross",
   "license": "MIT",
diff --git a/source/kotlin/README.md b/source/kotlin/README.md
index 163c9834..ed1a6ff3 100644
--- a/source/kotlin/README.md
+++ b/source/kotlin/README.md
@@ -25,7 +25,7 @@ allprojects {
 Now add the dependency:
 ```kotlin
 dependencies {
-    implementation("io.github.cosinekitty:astronomy:2.1.17")
+    implementation("io.github.cosinekitty:astronomy:2.1.18")
 }
 ```
 
diff --git a/source/kotlin/build.gradle.kts b/source/kotlin/build.gradle.kts
index dac9cf6d..c49ade75 100644
--- a/source/kotlin/build.gradle.kts
+++ b/source/kotlin/build.gradle.kts
@@ -6,7 +6,7 @@ plugins {
 }
 
 group = "io.github.cosinekitty"
-version = "2.1.17"
+version = "2.1.18"
 
 repositories {
     mavenCentral()
diff --git a/source/python/setup.py b/source/python/setup.py
index 4a6ff3a0..67b3f851 100644
--- a/source/python/setup.py
+++ b/source/python/setup.py
@@ -6,7 +6,7 @@ def _LoadFile(filename):
 
 setup(
     name='astronomy-engine',
-    version='2.1.17',
+    version='2.1.18',
     description='Astronomy calculation for Sun, Moon, and planets.',
     long_description=_LoadFile('README.md'),
     long_description_content_type='text/markdown',