diff --git a/RNTester/Podfile.lock b/RNTester/Podfile.lock
index 06b931a60..308fbb723 100644
--- a/RNTester/Podfile.lock
+++ b/RNTester/Podfile.lock
@@ -14,20 +14,22 @@ PODS:
     - Folly (= 2016.10.31.00)
     - React/Core
     - React/cxxreact
+    - React/jsiexecutor
   - React/cxxreact (1000.0.0):
     - boost-for-react-native (= 1.63.0)
     - Folly (= 2016.10.31.00)
-    - React/jschelpers
     - React/jsinspector
   - React/DevSupport (1000.0.0):
     - React/Core
     - React/RCTWebSocket
   - React/fishhook (1000.0.0)
-  - React/jschelpers (1000.0.0):
+  - React/jsi (1000.0.0):
     - Folly (= 2016.10.31.00)
-    - React/PrivateDatabase
+  - React/jsiexecutor (1000.0.0):
+    - Folly (= 2016.10.31.00)
+    - React/cxxreact
+    - React/jsi
   - React/jsinspector (1000.0.0)
-  - React/PrivateDatabase (1000.0.0)
   - React/RCTActionSheet (1000.0.0):
     - React/Core
   - React/RCTAnimation (1000.0.0):
@@ -103,8 +105,8 @@ SPEC CHECKSUMS:
   boost-for-react-native: 39c7adb57c4e60d6c5479dd8623128eb5b3f0f2c
   DoubleConversion: bb338842f62ab1d708ceb63ec3d999f0f3d98ecd
   Folly: c89ac2d5c6ab169cd7397ef27485c44f35f742c7
-  glog: e8acf0ebbf99759d3ff18c86c292a5898282dcde
-  React: 1fe0eb13d90b625d94c3b117c274dcfd2e760e11
+  glog: 848747cb7af3aac910395f03626d7f63636e8ce6
+  React: 8cb457c5485e7640094a7df86fcdb6d1e56e182c
   yoga: b1ce48b6cf950b98deae82838f5173ea7cf89e85
 
 PODFILE CHECKSUM: 7af77fbc34af9646e8c6389e7e2c0b4663bb16d9
diff --git a/React.podspec b/React.podspec
index 7f03a6350..8d20a4a1e 100644
--- a/React.podspec
+++ b/React.podspec
@@ -76,6 +76,7 @@ Pod::Spec.new do |s|
     ss.dependency             "Folly", folly_version
     ss.dependency             "React/Core"
     ss.dependency             "React/cxxreact"
+    ss.dependency             "React/jsiexecutor"
     ss.compiler_flags       = folly_compiler_flags
     ss.private_header_files = "React/Cxx*/*.h"
     ss.source_files         = "React/Cxx*/*.{h,m,mm}"
@@ -105,22 +106,32 @@ Pod::Spec.new do |s|
     ss.source_files         = "React/**/RCTTV*.{h,m}"
   end
 
-  s.subspec "jschelpers" do |ss|
-    ss.dependency             "Folly", folly_version
-    ss.dependency             "React/PrivateDatabase"
-    ss.compiler_flags       = folly_compiler_flags
-    ss.source_files         = "ReactCommon/jschelpers/*.{cpp,h}"
-    ss.private_header_files = "ReactCommon/jschelpers/*.h"
-    ss.pod_target_xcconfig  = { "HEADER_SEARCH_PATHS" => "\"$(PODS_TARGET_SRCROOT)/ReactCommon\"" }
-    ss.framework            = "JavaScriptCore"
-  end
-
   s.subspec "jsinspector" do |ss|
     ss.source_files         = "ReactCommon/jsinspector/*.{cpp,h}"
     ss.private_header_files = "ReactCommon/jsinspector/*.h"
     ss.pod_target_xcconfig  = { "HEADER_SEARCH_PATHS" => "\"$(PODS_TARGET_SRCROOT)/ReactCommon\"" }
   end
 
+  s.subspec "jsiexecutor" do |ss|
+    ss.dependency             "React/cxxreact"
+    ss.dependency             "React/jsi"
+    ss.dependency             "Folly", folly_version
+    ss.compiler_flags       = folly_compiler_flags
+    ss.source_files         = "ReactCommon/jsiexecutor/jsireact/*.{cpp,h}"
+    ss.private_header_files = "ReactCommon/jsiexecutor/jsireact/*.h"
+    ss.header_dir           = "jsireact"
+    ss.pod_target_xcconfig  = { "HEADER_SEARCH_PATHS" => "\"$(PODS_TARGET_SRCROOT)/ReactCommon\"" }
+  end
+
+  s.subspec "jsi" do |ss|
+    ss.dependency             "Folly", folly_version
+    ss.compiler_flags       = folly_compiler_flags
+    ss.source_files         = "ReactCommon/jsi/*.{cpp,h}"
+    ss.private_header_files = "ReactCommon/jsi/*.h"
+    ss.framework            = "JavaScriptCore"
+    ss.pod_target_xcconfig  = { "HEADER_SEARCH_PATHS" => "\"$(PODS_TARGET_SRCROOT)/ReactCommon\"" }
+  end
+
   s.subspec "PrivateDatabase" do |ss|
     ss.source_files         = "ReactCommon/privatedata/*.{cpp,h}"
     ss.private_header_files = "ReactCommon/privatedata/*.h"
@@ -128,7 +139,6 @@ Pod::Spec.new do |s|
   end
 
   s.subspec "cxxreact" do |ss|
-    ss.dependency             "React/jschelpers"
     ss.dependency             "React/jsinspector"
     ss.dependency             "boost-for-react-native", "1.63.0"
     ss.dependency             "Folly", folly_version