diff --git a/vasl_templates/webapp/data/vasl-version-aliases.json b/vasl_templates/webapp/data/vasl-version-aliases.json
new file mode 100644
index 0000000..007704f
--- /dev/null
+++ b/vasl_templates/webapp/data/vasl-version-aliases.json
@@ -0,0 +1,5 @@
+{
+
+"6.6.3.1": "6.6.3"
+
+}
diff --git a/vasl_templates/webapp/main.py b/vasl_templates/webapp/main.py
index 74b9aff..431e43a 100644
--- a/vasl_templates/webapp/main.py
+++ b/vasl_templates/webapp/main.py
@@ -130,6 +130,7 @@ def get_app_config():
         logging.error( "Can't check the VASSAL version: %s", str(ex) )
     if globvars.vasl_mod:
         vals["VASL_VERSION"] = globvars.vasl_mod.vasl_version
+        vals["VASL_REAL_VERSION"] = globvars.vasl_mod.vasl_real_version
 
     # include information about VASL extensions
     if globvars.vasl_mod and globvars.vasl_mod.extns:
@@ -179,6 +180,7 @@ def get_program_info():
     }
     if globvars.vasl_mod:
         params[ "VASL_VERSION" ] = globvars.vasl_mod.vasl_version
+        params[ "VASL_REAL_VERSION" ] = globvars.vasl_mod.vasl_real_version
     for key in [ "VASSAL_DIR", "VASL_MOD", "VASL_EXTNS_DIR", "BOARDS_DIR",
                  "JAVA_PATH", "WEBDRIVER_PATH", "CHAPTER_H_NOTES_DIR", "USER_FILES_DIR" ]:
         params[ key ] = app.config.get( key )
diff --git a/vasl_templates/webapp/templates/program-info-content.html b/vasl_templates/webapp/templates/program-info-content.html
index 76bcd92..cfaf740 100644
--- a/vasl_templates/webapp/templates/program-info-content.html
+++ b/vasl_templates/webapp/templates/program-info-content.html
@@ -23,7 +23,7 @@
     <td class="val"> {%if VASSAL_VERSION%} {{VASSAL_VERSION}} {%else%} <span class="na"> n/a </span> {%endif%}
          {%if VASSAL_DIR%} <span class="extra path"> {{VASSAL_DIR}} </span> {%endif%}
     <tr> <td class="key"> VASL:
-    <td class="val"> {%if VASL_VERSION%} {{VASL_VERSION}} {%else%} <span class="na"> n/a </span> {%endif%}
+    <td class="val"> {%if VASL_REAL_VERSION%} {{VASL_REAL_VERSION}} {%else%} <span class="na"> n/a </span> {%endif%}
          {%if VASL_MOD%} <span class="extra path"> {{VASL_MOD}} </span> {%endif%}
     <tr> <td class="key"> VASL extensions:
          <td class="val path"> {%if VASL_EXTNS_DIR%} {{VASL_EXTNS_DIR}} {%else%} - {%endif%}
diff --git a/vasl_templates/webapp/vasl_mod.py b/vasl_templates/webapp/vasl_mod.py
index b44ab71..3e21c47 100644
--- a/vasl_templates/webapp/vasl_mod.py
+++ b/vasl_templates/webapp/vasl_mod.py
@@ -48,7 +48,7 @@ def set_vasl_mod( vmod_fname, msg_store ):
             if msg_store:
                 msg_store.warning(
                     "This program has not been tested with VASL {}.<p>Things might work, but they might not...".format(
-                        globvars.vasl_mod.vasl_version
+                        globvars.vasl_mod.vasl_real_version
                     )
                 )
 
@@ -172,7 +172,7 @@ class VaslMod:
         # load the VASL module and any extensions
         self._load_vmod( data_dir )
         if self.vasl_version not in SUPPORTED_VASL_MOD_VERSIONS:
-            _logger.warning( "Unsupported VASL version: %s", self.vasl_version )
+            _logger.warning( "Unsupported VASL version: %s", self.vasl_real_version )
 
     def __del__( self ):
         # clean up
@@ -253,7 +253,16 @@ class VaslMod:
         # get the VASL version
         build_info = self._files[0][0].read( "buildFile" )
         doc = xml.etree.ElementTree.fromstring( build_info )
-        self.vasl_version = doc.attrib.get( "version" )
+        # NOTE: We have data files for each version of VASL, mostly for tracking things like changed GPID's,
+        # expected image URL problems, etc. These don't always change between releases, so to avoid
+        # having to create a new set of identical data files, we allow VASL versions to be aliased.
+        # This also helps in the case of emergency releases e.g. 6.6.3.1 is treated the same as 6.6.3,
+        # and beta releases (e.g. 6.6.4-beta5 = 6.6.3).
+        self.vasl_real_version = doc.attrib.get( "version" )
+        fname = os.path.join( data_dir, "vasl-version-aliases.json" )
+        with open( fname, "r", encoding="utf-8" ) as fp:
+            aliases = json.load( fp )
+        self.vasl_version = aliases.get( self.vasl_real_version, self.vasl_real_version )
 
         # load our overrides
         fname = os.path.join( data_dir, "vasl-"+self.vasl_version, "vasl-overrides.json" )