diff --git pdf.cc pdf.cc
index 1f580e4..9521fdf 100644
--- pdf.cc
+++ pdf.cc
@@ -10,8 +10,6 @@
 
 #include "base/command_line.h"
 #include "base/logging.h"
-#include "gin/array_buffer.h"
-#include "gin/public/isolate_holder.h"
 #include "pdf/out_of_process_instance.h"
 #include "ppapi/c/ppp.h"
 #include "ppapi/cpp/private/internal_module.h"
@@ -24,14 +22,6 @@ namespace {
 
 bool g_sdk_initialized_via_pepper = false;
 
-gin::IsolateHolder* g_isolate_holder = nullptr;
-
-void TearDownV8() {
-  g_isolate_holder->isolate()->Exit();
-  delete g_isolate_holder;
-  g_isolate_holder = nullptr;
-}
-
 }  // namespace
 
 PDFModule::PDFModule() {
@@ -39,7 +29,6 @@ PDFModule::PDFModule() {
 
 PDFModule::~PDFModule() {
   if (g_sdk_initialized_via_pepper) {
-    TearDownV8();
     chrome_pdf::ShutdownSDK();
     g_sdk_initialized_via_pepper = false;
   }
@@ -60,15 +49,8 @@ pp::Instance* PDFModule::CreateInstance(PP_Instance instance) {
       v8::V8::SetNativesDataBlob(&natives);
       v8::V8::SetSnapshotDataBlob(&snapshot);
     }
-    gin::IsolateHolder::Initialize(gin::IsolateHolder::kNonStrictMode,
-                                   gin::ArrayBufferAllocator::SharedInstance());
-    g_isolate_holder =
-        new gin::IsolateHolder(gin::IsolateHolder::kSingleThread);
-    g_isolate_holder->isolate()->Enter();
-    if (!chrome_pdf::InitializeSDK()) {
-      TearDownV8();
+    if (!chrome_pdf::InitializeSDK())
       return NULL;
-    }
     g_sdk_initialized_via_pepper = true;
   }
 
diff --git pdfium/pdfium_engine.cc pdfium/pdfium_engine.cc
index 8631088..d23c141 100644
--- pdfium/pdfium_engine.cc
+++ pdfium/pdfium_engine.cc
@@ -18,7 +18,9 @@
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
+#include "gin/array_buffer.h"
 #include "gin/public/gin_embedders.h"
+#include "gin/public/isolate_holder.h"
 #include "pdf/draw_utils.h"
 #include "pdf/pdfium/pdfium_api_string_buffer_adapter.h"
 #include "pdf/pdfium/pdfium_mem_buffer_file_read.h"
@@ -449,9 +451,27 @@ std::string GetDocumentMetadata(FPDF_DOCUMENT doc, const std::string& key) {
   return base::UTF16ToUTF8(value);
 }
 
+gin::IsolateHolder* g_isolate_holder = nullptr;
+
+void SetUpV8() {
+  gin::IsolateHolder::Initialize(gin::IsolateHolder::kNonStrictMode,
+                                 gin::ArrayBufferAllocator::SharedInstance());
+  g_isolate_holder =
+      new gin::IsolateHolder(gin::IsolateHolder::kSingleThread);
+  g_isolate_holder->isolate()->Enter();
+}
+
+void TearDownV8() {
+  g_isolate_holder->isolate()->Exit();
+  delete g_isolate_holder;
+  g_isolate_holder = nullptr;
+}
+
 }  // namespace
 
 bool InitializeSDK() {
+  SetUpV8();
+
   FPDF_LIBRARY_CONFIG config;
   config.version = 2;
   config.m_pUserFontPaths = nullptr;
@@ -470,6 +490,7 @@ bool InitializeSDK() {
 }
 
 void ShutdownSDK() {
+  TearDownV8();
   FPDF_DestroyLibrary();
 }