diff --git a/devices/Ft6xx6x/samples/Ft6xx6x.Samples.nfproj b/devices/Ft6xx6x/samples/Ft6xx6x.Samples.nfproj
index 4039703c64..a1e01c0db0 100644
--- a/devices/Ft6xx6x/samples/Ft6xx6x.Samples.nfproj
+++ b/devices/Ft6xx6x/samples/Ft6xx6x.Samples.nfproj
@@ -101,8 +101,8 @@
     <Reference Include="System.Diagnostics.Stopwatch, Version=1.2.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
       <HintPath>..\packages\nanoFramework.System.Diagnostics.Stopwatch.1.2.670\lib\System.Diagnostics.Stopwatch.dll</HintPath>
     </Reference>
-    <Reference Include="System.IO.FileSystem, Version=1.1.54.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.System.IO.FileSystem.1.1.54\lib\System.IO.FileSystem.dll</HintPath>
+    <Reference Include="System.IO.FileSystem, Version=1.1.66.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
+      <HintPath>..\packages\nanoFramework.System.IO.FileSystem.1.1.66\lib\System.IO.FileSystem.dll</HintPath>
     </Reference>
     <Reference Include="System.IO.Ports, Version=1.1.86.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
       <HintPath>..\packages\nanoFramework.System.IO.Ports.1.1.86\lib\System.IO.Ports.dll</HintPath>
diff --git a/devices/Ft6xx6x/samples/packages.config b/devices/Ft6xx6x/samples/packages.config
index 3e24462044..2c2ffa92e8 100644
--- a/devices/Ft6xx6x/samples/packages.config
+++ b/devices/Ft6xx6x/samples/packages.config
@@ -25,7 +25,7 @@
   <package id="nanoFramework.System.Device.Pwm" version="1.1.10" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.Device.Spi" version="1.3.52" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.Diagnostics.Stopwatch" version="1.2.670" targetFramework="netnano1.0" />
-  <package id="nanoFramework.System.IO.FileSystem" version="1.1.54" targetFramework="netnano1.0" />
+  <package id="nanoFramework.System.IO.FileSystem" version="1.1.66" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.IO.Ports" version="1.1.86" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.IO.Streams" version="1.1.59" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.Math" version="1.5.43" targetFramework="netnano1.0" />
diff --git a/devices/Ft6xx6x/samples/packages.lock.json b/devices/Ft6xx6x/samples/packages.lock.json
index 9cf1a2e415..e7b6f29c3d 100644
--- a/devices/Ft6xx6x/samples/packages.lock.json
+++ b/devices/Ft6xx6x/samples/packages.lock.json
@@ -154,9 +154,9 @@
       },
       "nanoFramework.System.IO.FileSystem": {
         "type": "Direct",
-        "requested": "[1.1.54, 1.1.54]",
-        "resolved": "1.1.54",
-        "contentHash": "K1QPNbrksqw4yjQ/GXgz1Q0hZBi3zi1A8/FUAhYsq8bESVNUFjNpvxHPSDw1gV8DzEg5jH5e9Z2VrAncTQogFQ=="
+        "requested": "[1.1.66, 1.1.66]",
+        "resolved": "1.1.66",
+        "contentHash": "bQIWR23R3UHTO7+icxqIvb07qHs1uI7kj+kjYNf+NTfUHunerfZ4v79+pcSudCR1p5bJHD8GVeV2Hyxl4SZAFw=="
       },
       "nanoFramework.System.IO.Ports": {
         "type": "Direct",