diff --git a/core/src/main/java/lucee/runtime/PageSourceImpl.java b/core/src/main/java/lucee/runtime/PageSourceImpl.java
index fb92ebf4f0..c334b781b4 100755
--- a/core/src/main/java/lucee/runtime/PageSourceImpl.java
+++ b/core/src/main/java/lucee/runtime/PageSourceImpl.java
@@ -210,7 +210,7 @@ public PageSource getParent() {
 	}
 
 	@Override
-	public synchronized Page loadPage(PageContext pc, boolean forceReload) throws PageException {
+	public Page loadPage(PageContext pc, boolean forceReload) throws PageException {
 		if (forceReload) pcn.reset();
 
 		Page page = pcn.page;
@@ -229,7 +229,7 @@ public synchronized Page loadPage(PageContext pc, boolean forceReload) throws Pa
 	}
 
 	@Override
-	public synchronized Page loadPageThrowTemplateException(PageContext pc, boolean forceReload, Page defaultValue) throws TemplateException {
+	public Page loadPageThrowTemplateException(PageContext pc, boolean forceReload, Page defaultValue) throws TemplateException {
 		if (forceReload) pcn.reset();
 
 		Page page = pcn.page;
@@ -247,7 +247,7 @@ public synchronized Page loadPageThrowTemplateException(PageContext pc, boolean
 	}
 
 	@Override
-	public synchronized Page loadPage(PageContext pc, boolean forceReload, Page defaultValue) {
+	public Page loadPage(PageContext pc, boolean forceReload, Page defaultValue) {
 		if (forceReload) pcn.reset();
 
 		Page page = pcn.page;
@@ -278,17 +278,19 @@ public synchronized Page loadPage(PageContext pc, boolean forceReload, Page defa
 	private Page loadArchive(Page page) {
 		if (!mapping.hasArchive()) return null;
 		if (page != null && page.getLoadType() == LOAD_ARCHIVE) return page;
-		try {
-			Class clazz = mapping.getArchiveClass(getClassName());
-			page = newInstance(clazz);
-			page.setPageSource(this);
-			page.setLoadType(LOAD_ARCHIVE);
-			pcn.set(page);
-			return page;
-		}
-		catch (Exception e) {
-			// MUST print.e(e); is there a better way?
-			return null;
+		synchronized (this) {
+			try {
+				Class clazz = mapping.getArchiveClass(getClassName());
+				page = newInstance(clazz);
+				page.setPageSource(this);
+				page.setLoadType(LOAD_ARCHIVE);
+				pcn.set(page);
+				return page;
+			}
+			catch (Exception e) {
+				// MUST print.e(e); is there a better way?
+				return null;
+			}
 		}
 	}
 
@@ -315,27 +317,33 @@ private Page loadPhysical(PageContext pc, Page page) throws TemplateException {
 		if (page != null) {
 			// if(page!=null && !recompileAlways) {
 			if (srcLastModified != page.getSourceLastModified()) {
-				// same size, maybe the content has not changed?
-				boolean same = false;
-				if (page instanceof PagePro && ((PagePro) page).getSourceLength() == srcFile.length()) {
-					PagePro pp = (PagePro) page;
-					try {
-						same = pp.getHash() == PageSourceCode.toString(this, config.getTemplateCharset()).hashCode();
-					}
-					catch (IOException e) {
-					}
+				synchronized (this) {
+					if (srcLastModified != page.getSourceLastModified()) {
+						// same size, maybe the content has not changed?
+						boolean same = false;
+						if (page instanceof PagePro && ((PagePro) page).getSourceLength() == srcFile.length()) {
+							PagePro pp = (PagePro) page;
+							try {
+								same = pp.getHash() == PageSourceCode.toString(this, config.getTemplateCharset()).hashCode();
+							}
+							catch (IOException e) {
+							}
 
-				}
-				if (!same) {
-					LogUtil.log(pc, Log.LEVEL_DEBUG, "compile", "recompile [" + getDisplayPath() + "] because loaded page has changed");
-					pcn.set(page = compile(config, mapping.getClassRootDirectory(), page, false, pc.ignoreScopes()));
-					page.setPageSource(this);
+						}
+						if (!same) {
+							LogUtil.log(pc, Log.LEVEL_DEBUG, "compile", "recompile [" + getDisplayPath() + "] because loaded page has changed");
+							pcn.set(page = compile(config, mapping.getClassRootDirectory(), page, false, pc.ignoreScopes()));
+							page.setPageSource(this);
+						}
+					}
 				}
 			}
 			page.setLoadType(LOAD_PHYSICAL);
+			pci.setPageUsed(page);
+			return page;
 		}
 		// page doesn't exist
-		else {
+		synchronized (this) {
 			Resource classRootDir = mapping.getClassRootDirectory();
 			Resource classFile = classRootDir.getRealResource(getJavaName() + ".class");
 			boolean isNew = false;
diff --git a/loader/build.xml b/loader/build.xml
index 85bc523989..a572ec69e3 100644
--- a/loader/build.xml
+++ b/loader/build.xml
@@ -2,7 +2,7 @@
 <project default="core" basedir="." name="Lucee" 
   xmlns:resolver="antlib:org.apache.maven.resolver.ant">
 
-  <property name="version" value="5.4.3.6-SNAPSHOT"/>
+  <property name="version" value="5.4.3.7-SNAPSHOT"/>
 
   <taskdef uri="antlib:org.apache.maven.resolver.ant" resource="org/apache/maven/resolver/ant/antlib.xml">
     <classpath>
diff --git a/loader/pom.xml b/loader/pom.xml
index 26a30e5a48..d5bbc1afe4 100644
--- a/loader/pom.xml
+++ b/loader/pom.xml
@@ -3,7 +3,7 @@
 
   <groupId>org.lucee</groupId>
   <artifactId>lucee</artifactId>
-  <version>5.4.3.6-SNAPSHOT</version>
+  <version>5.4.3.7-SNAPSHOT</version>
   <packaging>jar</packaging>
 
   <name>Lucee Loader Build</name>