diff --git a/.github/workflows/ci-master.yml b/.github/workflows/ci-master.yml
index 2f0be760..31bb4534 100644
--- a/.github/workflows/ci-master.yml
+++ b/.github/workflows/ci-master.yml
@@ -9,6 +9,10 @@ on:
 
 name: ci-master
 
+env:
+  SHOCKLINK_API_URL: api.shocklink.net
+  SHOCKLINK_FW_VERSION: master-${{ github.sha }}
+
 jobs:
 
   # Copied verbatim from https://docs.platformio.org/en/stable/integration/ci/github-actions.html
@@ -22,6 +26,8 @@ jobs:
         with:
           path: |
             ~/.cache/pip
+            ~/.platformio/platforms
+            ~/.platformio/packages
             ~/.platformio/cache
           key: ${{ runner.os }}-arch
 
diff --git a/.github/workflows/ci-tag.yml b/.github/workflows/ci-tag.yml
index 4d9f7537..64636982 100644
--- a/.github/workflows/ci-tag.yml
+++ b/.github/workflows/ci-tag.yml
@@ -5,6 +5,10 @@ on:
 
 name: ci-tag
 
+env:
+  SHOCKLINK_API_URL: api.shocklink.net
+  SHOCKLINK_FW_VERSION: ${{ github.ref_name }}
+
 jobs:
 
   # Copied verbatim from https://docs.platformio.org/en/stable/integration/ci/github-actions.html
@@ -18,6 +22,8 @@ jobs:
         with:
           path: |
             ~/.cache/pip
+            ~/.platformio/platforms
+            ~/.platformio/packages
             ~/.platformio/cache
           key: ${{ runner.os }}-arch
 
diff --git a/embed_version.py b/embed_version.py
new file mode 100644
index 00000000..eba1be54
--- /dev/null
+++ b/embed_version.py
@@ -0,0 +1,17 @@
+import os
+
+Import("env")
+
+# This file is invoked by PlatformIO during build.
+# See "extra_scripts" in "platformio.ini".
+
+# Fetch environment variables, with sane defaults if not found.
+# These variables should be defined by the CI.
+shocklinkApiUrl = os.getenv('SHOCKLINK_API_URL') or "api.shocklink.net"
+shocklinkFwVersion = os.getenv('SHOCKLINK_FW_VERSION') or "0.8.1"
+
+# Define these variables as macros for expansion during build time.
+env.Append(CPPDEFINES=[
+    ("SHOCKLINK_API_URL", env.StringifyMacro(shocklinkApiUrl)),
+    ("SHOCKLINK_FW_VERSION", env.StringifyMacro(shocklinkFwVersion))
+])
diff --git a/platformio.ini b/platformio.ini
index 211d2181..991dcd61 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -19,3 +19,5 @@ lib_deps =
 	links2004/WebSockets@^2.3.7
 	https://github.com/me-no-dev/ESPAsyncWebServer.git
 board_build.partitions = huge_app.csv
+extra_scripts =
+	pre:embed_version.py
\ No newline at end of file
diff --git a/src/ShockLink.cpp b/src/ShockLink.cpp
index 389c0f85..9c808e4d 100644
--- a/src/ShockLink.cpp
+++ b/src/ShockLink.cpp
@@ -14,10 +14,9 @@
 #include "SPIFFS.h"
 #include "HTTPClient.h"
 #include <LedManager.h>
-#include <Version.h>
 
-const String apiUrl = "api.shocklink.net";
-const String devApiUrl = "dev-api.shocklink.net";
+const String shocklinkApiUrl = SHOCKLINK_API_URL;
+const String shocklinkFwVersion = SHOCKLINK_FW_VERSION;
 
 WiFiMulti WiFiMulti;
 WebSocketsClient webSocket;
@@ -229,7 +228,7 @@ void setup()
     Serial.println();
     Serial.println();
     Serial.print("==== ShockLink v");
-    Serial.print(versionString);
+    Serial.print(shocklinkFwVersion);
     Serial.println(" ====");
 
     LedManager::Loop(WL_IDLE_STATUS, false, 0);
@@ -292,8 +291,8 @@ void setup()
     String authToken = authTokenFile.readString();
     authTokenFile.close();
 
-    webSocket.setExtraHeaders(("FirmwareVersion:" + versionString + "\r\nDeviceToken: " + authToken).c_str());
-    webSocket.beginSSL(apiUrl, 443, "/1/ws/device");
+    webSocket.setExtraHeaders(("FirmwareVersion:" + shocklinkFwVersion + "\r\nDeviceToken: " + authToken).c_str());
+    webSocket.beginSSL(shocklinkApiUrl, 443, "/1/ws/device");
     webSocket.onEvent(webSocketEvent);
     runner.addTask(keepalive);
     keepalive.enable();
@@ -421,7 +420,7 @@ void loop()
                 SPIFFS.remove("/pairCode");
 
                 HTTPClient http;
-                String uri = "https://" + apiUrl + "/1/pair/" + pairCode;
+                String uri = "https://" + shocklinkApiUrl + "/1/pair/" + pairCode;
 
                 Serial.print("Contacting pair code url: ");
                 Serial.println(uri);
diff --git a/src/Version.h b/src/Version.h
deleted file mode 100644
index 5cac854c..00000000
--- a/src/Version.h
+++ /dev/null
@@ -1 +0,0 @@
-const String versionString = "0.8.0";
\ No newline at end of file