diff --git a/.github/workflows/1-pr.yaml b/.github/workflows/1-pr.yaml
index b38b914d0..581c168af 100644
--- a/.github/workflows/1-pr.yaml
+++ b/.github/workflows/1-pr.yaml
@@ -128,7 +128,7 @@ jobs:
         working-directory: ./src/CarbonAware.WebApi/src 
       
       - name: Upload swagger artifact
-        uses: actions/upload-artifact@v1
+        uses: actions/upload-artifact@v4
         with:
           name: pr-swagger.yaml
           path: src/CarbonAware.WebApi/src/wwwroot/api/v1/swagger.yaml
@@ -184,11 +184,11 @@ jobs:
         env:
           DOTNET_ROLL_FORWARD: LatestMajor
       - name: Upload dev artifact
-        uses: actions/upload-artifact@v1
+        uses: actions/upload-artifact@v4
         with:
           name: dev-swagger.yaml
           path: src/CarbonAware.WebApi/src/wwwroot/api/v1/swagger.yaml
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: pr-swagger.yaml
           path: ./src/CarbonAware.WebApi/src/wwwroot/api/v1/pr-swagger.yaml
diff --git a/.github/workflows/dev_carbon-aware-api.yml b/.github/workflows/dev_carbon-aware-api.yml
index f1c4dc4ae..5bc799ad6 100644
--- a/.github/workflows/dev_carbon-aware-api.yml
+++ b/.github/workflows/dev_carbon-aware-api.yml
@@ -32,7 +32,7 @@ jobs:
         run: dotnet publish -c Release -o ${{env.DOTNET_ROOT}}/myapp
 
       - name: Upload artifact for deployment job
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: CarbonAwareApi
           path: ${{env.DOTNET_ROOT}}/myapp
@@ -46,7 +46,7 @@ jobs:
 
     steps:
       - name: Download artifact from build job
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4
         with:
           name: CarbonAwareApi
 
diff --git a/casdk-docs/docs/architecture/decisions/0016-watt-time-v3.md b/casdk-docs/docs/architecture/decisions/0016-watt-time-v3.md
index e585ad37e..30b2b221a 100644
--- a/casdk-docs/docs/architecture/decisions/0016-watt-time-v3.md
+++ b/casdk-docs/docs/architecture/decisions/0016-watt-time-v3.md
@@ -37,11 +37,11 @@ The `Login` is now at a different base URL, and to avoid any future issues a dif
 
 | API Endpoint | Description | Path (v2) | Path (v3) | Notes |
 |--------------|-------------|-----------|-----------|---|
-| Data         | Get data    | /data     | /historical          |  _Request_ <li> `starttime` is now `start` and mandatory </li> <li> `endtime` is now `end` and mandatory </li><li> `ba` is now `region` </li><li> `signal_type` added _Response_ </li><li> `signal_type` added</li>|
-| Forecast     | Get forecast| /forecast | /forecast   | No longer be used for historical data _Request_ <li> `ba` is now `region` </li><li> `extended_forecast` removed </li><li> `horizon_hours` added  </li><li> `signal_type` added </li><li> Historical forecasts are now at `/forecast/historical` <br /> _Response_ </li><li> `signal_type` added </li>
-| Historical   | Get historical forecast data | /historical (?) | /forecast/historical (?)           | This changed signficantly.  <br /> _Request_ <li> `ba` is now `region` </li><li> `starttime` is now `start` and mandatory </li><li> `endtime` is now `end` and mandatory </li><li> `signal_type` added <br /> _Response_ </li><li> `signal_type` added </li>
-| Balancing Authority From Location | Get balancing authority from location | /ba-from-loc | /region-from-loc          | Check if the CA SDK uses BA at all <br /><br /> _Request_ <li> `name` is now `region_full_name` </li><li> `abbrev` is now `region` </li><li> `signal_type` added <br /> _Response_ </li><li> `id` removed </li><li> `signal_type` added </li> | 
-| Login        | User login  | https://api2.watttime.org/v2/login    | https://api.watttime.org/login | Path has changed from being version specific to being no longer related to the API version.  <br /><br /> Updated in `WattTimeClient` to now have 2 HTTP clients to decouple versions from the login. |
+| Data         | Get data    | /data     | /historical          |  _Request_ <li> `starttime` is now `start` and mandatory <li> `endtime` is now `end` and mandatory <li> `ba` is now `region` <li> `signal_type` added <br> _Response_ <li> `signal_type` added |
+| Forecast     | Get forecast| /forecast | /forecast   | <br> No longer be used for historical data <br> _Request_ <li> `ba` is now `region` <li> `extended_forecast` removed <li> `horizon_hours` added  <li> `signal_type` added <li> Historical forecasts are now at `/forecast/historical` <br> _Response_ <li> `signal_type` added |
+| Historical   | Get historical forecast data | /historical (?) | /forecast/historical (?)           | This changed signficantly.  <br> _Request_ <li> `ba` is now `region` <li> `starttime` is now `start` and mandatory <li> `endtime` is now `end` and mandatory <li> `signal_type` added <br> _Response_ <li> `signal_type` added |
+| Balancing Authority From Location | Get balancing authority from location | /ba-from-loc | /region-from-loc          | Check if the CA SDK uses BA at all <br><br> _Request_ <li> `name` is now `region_full_name` <li> `abbrev` is now `region` <li> `signal_type` added <br> _Response_ <li> `id` removed <li> `signal_type` added  | 
+| Login        | User login  | https://api2.watttime.org/v2/login    | https://api.watttime.org/login | Path has changed from being version specific to being no longer related to the API version.  <br><br> Updated in `WattTimeClient` to now have 2 HTTP clients to decouple versions from the login. |
 
 ### Query Strings