diff --git a/ion/src/device/bench/command/pcb_version.cpp b/ion/src/device/bench/command/pcb_version.cpp
index 190ea7274..99f1e29f0 100644
--- a/ion/src/device/bench/command/pcb_version.cpp
+++ b/ion/src/device/bench/command/pcb_version.cpp
@@ -23,6 +23,7 @@ void PCBVersion(const char * input) {
     reply(sKO);
     return;
   }
+  Board::lockVersionOTP();
 #endif
   reply(sOK);
 }
diff --git a/ion/src/device/n0100/drivers/board.cpp b/ion/src/device/n0100/drivers/board.cpp
index cd9ebad17..bd1345a4d 100644
--- a/ion/src/device/n0100/drivers/board.cpp
+++ b/ion/src/device/n0100/drivers/board.cpp
@@ -240,6 +240,8 @@ PCBVersion readPCBVersionInMemory() {
 
 void writePCBVersion(PCBVersion) {}
 
+void lockVersionOTP() {}
+
 }
 }
 }
diff --git a/ion/src/device/n0110/drivers/board.cpp b/ion/src/device/n0110/drivers/board.cpp
index c7d8391eb..bcb354d02 100644
--- a/ion/src/device/n0110/drivers/board.cpp
+++ b/ion/src/device/n0110/drivers/board.cpp
@@ -394,12 +394,17 @@ PCBVersion readPCBVersionInMemory() {
 }
 
 void writePCBVersion(PCBVersion version) {
-  /* TODO: We also need to lock the OTP in which the version has been written. */
   uint8_t * destination = reinterpret_cast<uint8_t *>(InternalFlash::Config::OTPAddresses[pcbVersionOTPIndex]);
   PCBVersion formattedVersion = ~version;
   InternalFlash::WriteMemory(destination, reinterpret_cast<uint8_t *>(&formattedVersion), sizeof(formattedVersion));
 }
 
+void lockVersionOTP() {
+  uint8_t * destination = reinterpret_cast<uint8_t *>(InternalFlash::Config::OTPLocksAddress + pcbVersionOTPIndex);
+  uint8_t zero = 0x00;
+  InternalFlash::WriteMemory(destination, &zero, sizeof(zero));
+}
+
 }
 }
 }
diff --git a/ion/src/device/shared/drivers/board.h b/ion/src/device/shared/drivers/board.h
index 9bbe9b62a..68dcaa2be 100644
--- a/ion/src/device/shared/drivers/board.h
+++ b/ion/src/device/shared/drivers/board.h
@@ -30,6 +30,7 @@ typedef uint32_t PCBVersion;
 PCBVersion readPCBVersion();
 PCBVersion readPCBVersionInMemory();
 void writePCBVersion(PCBVersion version);
+void lockVersionOTP();
 
 }
 }