diff --git a/requirements.txt b/requirements.txt
index b45e45329..7a668c142 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -945,8 +945,8 @@ sniffio==1.3.1 \
     # via
     #   anyio
     #   httpx
-soil-id @ https://github.com/techmatters/soil-id-algorithm/archive/06c22b9.zip \
-    --hash=sha256:267b2c2c6d77e001f2771e5a92691f40a9219078e8d45dc5235885275715abe3
+soil-id @ https://github.com/techmatters/soil-id-algorithm/archive/ad9ae16.zip \
+    --hash=sha256:a38192dafb5029c830e6c7e04e5f54ac2cf21dd9a42b8ac99182b6ea9082d208
     # via -r requirements/base.in
 sqlparse==0.5.2 \
     --hash=sha256:9e37b35e16d1cc652a2545f0997c1deb23ea28fa1f3eefe609eee3063c3b105f \
diff --git a/requirements/base.in b/requirements/base.in
index 73014aa96..e18a0ed72 100644
--- a/requirements/base.in
+++ b/requirements/base.in
@@ -25,4 +25,4 @@ requests
 rules
 sentry-sdk[django]
 shapely
-soil-id @ https://github.com/techmatters/soil-id-algorithm/archive/06c22b9.zip
+soil-id @ https://github.com/techmatters/soil-id-algorithm/archive/ad9ae16.zip