diff --git a/CHANGELOG.md b/CHANGELOG.md
index d93cda1bb..89255765c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,15 @@
 miniSphere Changelog
 ====================
 
+v5.2.7 - May 20, 2018
+---------------------
+
+* Improves JavaScript performance by enabling idle processing in ChakraCore.
+* Fixes an issue where errors for failed mJS module imports don't include the
+  filename of the importing module.
+* Fixes a bug where Cell doesn't show the offending script filename when a
+  build fails due to a JavaScript syntax error.
+
 v5.2.6 - May 14, 2018
 ---------------------
 
diff --git a/CHECKLIST.md b/CHECKLIST.md
index 1a84c6ac6..975496f53 100644
--- a/CHECKLIST.md
+++ b/CHECKLIST.md
@@ -16,7 +16,7 @@ this new commit.
 * Version number in `src/plugin/Properties/AssemblyInfo.cs`
 * Version number and release date in `README.md`
 * Version number and release date in manual pages (`manpages/*`)
-* Version number and release date in `CHANGELOG.md`
+* Version number, release date, and changelog entries in `CHANGELOG.md`
 * Version number in `setup/minisphere.iss`
 
 
diff --git a/README.md b/README.md
index ca304253d..f4d750ff6 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ Download
 ========
 
 The latest stable miniSphere release at the time of this writing is
-**miniSphere 5.2.6**, released on Monday, May 14, 2018.  miniSphere
+**miniSphere 5.2.7**, released on Sunday, May 20, 2018.  miniSphere
 binaries are provided through GitHub, and the latest version is always
 available for download here:
 
diff --git a/VERSION b/VERSION
index bf5606571..0a9e37479 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-X.X.X
\ No newline at end of file
+5.2.7
\ No newline at end of file
diff --git a/manpages/cell.1 b/manpages/cell.1
index a8fafb48d..f6e6bdbc8 100644
--- a/manpages/cell.1
+++ b/manpages/cell.1
@@ -1,4 +1,4 @@
-.TH CELL 1 "xxxx-xx-xx" "miniSphere X.X.X" "Sphere Game Development Kit"
+.TH CELL 1 "2018-05-20" "miniSphere 5.2.7" "Sphere Game Development Kit"
 .SH NAME
 cell \- Sphere v2 game compiler and packager
 .SH SYNOPSIS
diff --git a/manpages/minisphere.1 b/manpages/minisphere.1
index 05b329490..879060080 100644
--- a/manpages/minisphere.1
+++ b/manpages/minisphere.1
@@ -1,4 +1,4 @@
-.TH MINISPHERE 1 "xxxx-xx-xx" "miniSphere X.X.X" "miniSphere JS Game Engine"
+.TH MINISPHERE 1 "2018-05-20" "miniSphere 5.2.7" "miniSphere JS Game Engine"
 .SH NAME
 minisphere \- lightweight JavaScript-powered game engine
 .SH SYNOPSIS
diff --git a/manpages/spherun.1 b/manpages/spherun.1
index bcae545d6..049dcad5a 100644
--- a/manpages/spherun.1
+++ b/manpages/spherun.1
@@ -1,4 +1,4 @@
-.TH SPHERUN 1 "xxxx-xx-xx" "miniSphere X.X.X" "Sphere Game Development Kit"
+.TH SPHERUN 1 "2018-05-20" "miniSphere 5.2.7" "Sphere Game Development Kit"
 .SH NAME
 spherun \- run a Sphere game in a dev-friendly environment
 .SH SYNOPSIS
diff --git a/manpages/ssj.1 b/manpages/ssj.1
index 359825e7d..aebe45bc0 100644
--- a/manpages/ssj.1
+++ b/manpages/ssj.1
@@ -1,4 +1,4 @@
-.TH SSJ 1 "xxxx-xx-xx" "miniSphere X.X.X" "Sphere Game Development Kit"
+.TH SSJ 1 "2018-05-20" "miniSphere 5.2.7" "Sphere Game Development Kit"
 .SH NAME
 ssj \- the JavaScript debugger for miniSphere
 .SH SYNOPSIS
diff --git a/msvs/cell.rc b/msvs/cell.rc
index 82abb7161..503a9ca40 100644
Binary files a/msvs/cell.rc and b/msvs/cell.rc differ
diff --git a/msvs/minisphere.rc b/msvs/minisphere.rc
index cea6eecc3..433560492 100644
Binary files a/msvs/minisphere.rc and b/msvs/minisphere.rc differ
diff --git a/msvs/ssj.rc b/msvs/ssj.rc
index d84bb91a1..89cb8990a 100644
Binary files a/msvs/ssj.rc and b/msvs/ssj.rc differ
diff --git a/setup/minisphere.iss b/setup/minisphere.iss
index 8569e97ee..1a3db60d9 100644
--- a/setup/minisphere.iss
+++ b/setup/minisphere.iss
@@ -33,7 +33,7 @@
 ; solution configurations.
 #define AppName "miniSphere"
 #define AppPublisher "Fat Cerberus"
-#define AppVersion3 "X.X.X"
+#define AppVersion3 "5.2.7"
 
 ; to create a bundle with Sphere Studio, copy the Sphere Studio binaries
 ; into msw/ide/ before building the installer.
diff --git a/src/plugin/PluginMain.cs b/src/plugin/PluginMain.cs
index 556145628..03c667473 100644
--- a/src/plugin/PluginMain.cs
+++ b/src/plugin/PluginMain.cs
@@ -16,7 +16,7 @@ public class PluginMain : IPluginMain
     {
         public string Name { get; } = "miniSphere Support";
         public string Description { get; } = "Supports miniSphere and the Sphere v2 toolchain.";
-        public string Version { get; } = "X.X.X";
+        public string Version { get; } = "5.2.7";
         public string Author { get; } = "Fat Cerberus";
 
         internal PluginConf Conf { get; private set; }
diff --git a/src/plugin/Properties/AssemblyInfo.cs b/src/plugin/Properties/AssemblyInfo.cs
index 43610abf5..a3da81b23 100644
--- a/src/plugin/Properties/AssemblyInfo.cs
+++ b/src/plugin/Properties/AssemblyInfo.cs
@@ -32,5 +32,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("0.0.0.0")]
-[assembly: AssemblyFileVersion("0.0.0.0")]
+[assembly: AssemblyVersion("5.2.7.2859")]
+[assembly: AssemblyFileVersion("5.2.7.2859")]
diff --git a/src/shared/version.h b/src/shared/version.h
index 494cdb50b..23cd0ae76 100644
--- a/src/shared/version.h
+++ b/src/shared/version.h
@@ -37,7 +37,7 @@
 #define SPHERE_COMPILER_NAME "Cell"
 #define SPHERE_DEBUGGER_NAME "SSj"
 
-#define SPHERE_VERSION "X.X.X"
+#define SPHERE_VERSION "5.2.7"
 
 #define SPHERE_API_VERSION      2
 #define SPHERE_API_LEVEL        2