diff --git a/honoka-plugins/jsfilter/src/jsfilter.cpp b/honoka-plugins/jsfilter/src/jsfilter.cpp
index c9ec71d..e578add 100644
--- a/honoka-plugins/jsfilter/src/jsfilter.cpp
+++ b/honoka-plugins/jsfilter/src/jsfilter.cpp
@@ -40,6 +40,7 @@
 
 HonokaPluginRegister(JSFilter);
 HonokaPluginSetup(JSFilter);
+HonokaPluginReload(JSFilter);
 
 HonokaSetupCorePage *JSFilter::setup()
 {
@@ -69,19 +70,38 @@
     return page;
 };
 
+JSFilter *JSFilter::jsself = 0;
+bool JSFilter::resetf = false;
+
+bool JSFilter::reload(ConfigPointer cfg)
+{
+    resetf = true;
+    return true;
+}
 
 JSFilter::JSFilter(ConfigPointer cfg) : TextFilter(cfg)
 {
+    init(cfg);
+}
+
+void JSFilter::init(ConfigPointer cfg) {
+    //if (jsself != 0) delete jsproc;
     file = cfg->read(String(HONOKA_CONFIG_JSFILTER_FILE),
         String(HONOKA_DEFAULT_JSFILTER_FILE));
     func = cfg->read(String(HONOKA_CONFIG_JSFILTER_FUNC),
         String(HONOKA_DEFAULT_JSFILTER_FUNC));
-    jsproc = new JSProc(file);
+    if (jsself == 0) {
+        jsproc = new JSProc(file);
+        jsself = this;
+    } else {
+        jsproc->init(file);
+    }
 }
 
 
 JSFilter::~JSFilter()
 {
+    delete jsproc;
 }
 
 
@@ -98,6 +118,10 @@
 
 const WideString JSFilter::filter(const WideString &text)
 {
+    if (resetf == true) {
+        init(config);
+        resetf = false;
+    }
     String script;
     String sanit;
     //String func = "misakura(\"%%\").toString();";
diff --git a/honoka-plugins/jsfilter/src/jsfilter.h b/honoka-plugins/jsfilter/src/jsfilter.h
index c6bff4b..55440cd 100644
--- a/honoka-plugins/jsfilter/src/jsfilter.h
+++ b/honoka-plugins/jsfilter/src/jsfilter.h
@@ -56,12 +56,16 @@
     virtual String getPropertyName();
     virtual const WideString filter(const WideString &text);
     static HonokaSetupCorePage *setup();
-
+    static bool reload(ConfigPointer cfg);
+protected:
+    void init(ConfigPointer cfg);
 
 protected:
     JSProc *jsproc;
     String file;
     String func;
+    static JSFilter *jsself;
+    static bool resetf;
 };
 }
 #endif
diff --git a/honoka-plugins/jsfilter/src/jsproc.cpp b/honoka-plugins/jsfilter/src/jsproc.cpp
index c204f9f..2b8d222 100644
--- a/honoka-plugins/jsfilter/src/jsproc.cpp
+++ b/honoka-plugins/jsfilter/src/jsproc.cpp
@@ -54,7 +54,9 @@
         jscs.resolve = (JSResolveOp)resolve;
         jscs.convert = JS_ConvertStub;
         jscs.finalize = JS_FinalizeStub;
-
+        jsrt = NULL;
+        jsct = NULL;
+        jsobj = NULL;
     };
     static JSBool resolve(JSContext *context,JSObject *obj,jsval id,uintN flags,JSObject **objp) {
         return JS_TRUE;
@@ -69,10 +71,14 @@
 JSProc::JSProc(const string &filename)
 {
     jspriv = new JSProcPriv();
-    jspriv->jsrt = NULL;
-    jspriv->jsct = NULL;
-    jspriv->jsobj = NULL;
-    
+    init(filename);
+}
+
+
+void JSProc::init(const string &filename)
+{
+    if (jspriv->jsct) JS_DestroyContext(jspriv->jsct);
+    if (jspriv->jsrt) JS_DestroyRuntime(jspriv->jsrt);
     int fd = open(filename.c_str(),O_RDONLY);
     if (fd == -1) return;
     off_t mmapsize = lseek(fd,0,SEEK_END);
@@ -84,6 +90,8 @@
     if (!jspriv->jsct) {
         JS_DestroyRuntime(jspriv->jsrt);
         jspriv->jsrt = NULL;
+        munmap(mmapptr,mmapsize);
+        close(fd);
         return;
     }
     jspriv->jsobj = JS_NewObject(jspriv->jsct,&jspriv->jscs, NULL, NULL);
@@ -92,6 +100,8 @@
         jspriv->jsct = NULL;
         JS_DestroyRuntime(jspriv->jsrt);
         jspriv->jsrt = NULL;
+        munmap(mmapptr,mmapsize);
+        close(fd);
         return;
     }
     if (!JS_InitStandardClasses(jspriv->jsct,jspriv->jsobj)) {
@@ -99,6 +109,8 @@
         jspriv->jsct = NULL;
         JS_DestroyRuntime(jspriv->jsrt);
         jspriv->jsrt = NULL;
+        munmap(mmapptr,mmapsize);
+        close(fd);
         return;
     }
     
@@ -110,6 +122,8 @@
         jspriv->jsct = NULL;
         JS_DestroyRuntime(jspriv->jsrt);
         jspriv->jsrt = NULL;
+        munmap(mmapptr,mmapsize);
+        close(fd);
         return;
     }
     munmap(mmapptr,mmapsize);
@@ -117,7 +131,6 @@
     return;
 }
 
-
 JSProc::~JSProc()
 {
     if (jspriv->jsct) JS_DestroyContext(jspriv->jsct);
diff --git a/honoka-plugins/jsfilter/src/jsproc.h b/honoka-plugins/jsfilter/src/jsproc.h
index aeb3a8f..ba4938f 100644
--- a/honoka-plugins/jsfilter/src/jsproc.h
+++ b/honoka-plugins/jsfilter/src/jsproc.h
@@ -36,6 +36,7 @@
 
     ~JSProc();
     string eval(const string &script);
+    void init(const string &filename);
 
 private:
     JSProcPriv *jspriv;