diff --git a/backend/Cargo.lock b/backend/Cargo.lock
index c1cc5f82..767cab6b 100644
--- a/backend/Cargo.lock
+++ b/backend/Cargo.lock
@@ -2312,9 +2312,9 @@ dependencies = [
 
 [[package]]
 name = "solar-positioning"
-version = "0.6.1"
+version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "91d6872cbbd3f5ae24ef8e5f759b235a080d3592c8ddbc0c38c8985b19f6c34a"
+checksum = "33e67ad3108959c32cd9ab2515f7ced367e640c0454c6277f67c3dacc7d1d0a2"
 dependencies = [
  "chrono",
 ]
diff --git a/backend/Cargo.toml b/backend/Cargo.toml
index 320659e4..04241697 100644
--- a/backend/Cargo.toml
+++ b/backend/Cargo.toml
@@ -25,7 +25,7 @@ chrono = { version = "0.4", features = ["serde"] }
 chrono-tz = "0.10"
 quick-xml = "0.42"
 sun = "0.3"
-solar-positioning = "0.6"
+solar-positioning = "0.7"
 hmac = "0.13.0"
 sha1 = "0.11.0"
 md5 = "0.8.0"
diff --git a/backend/src/pv/forecast/solar.rs b/backend/src/pv/forecast/solar.rs
index 0fdc4815..8c41705b 100644
--- a/backend/src/pv/forecast/solar.rs
+++ b/backend/src/pv/forecast/solar.rs
@@ -5,7 +5,7 @@
 //! zenith is degrees from vertical.
 
 use chrono::{DateTime, Datelike, Utc};
-use solar_positioning::{spa, RefractionCorrection};
+use solar_positioning::{Location, RefractionCorrection, SolarPositions};
 
 /// Observer elevation, atmosphere and ΔT used for the sun position. Refraction
 /// depends on the first three, but only near the horizon, so standard sea-level
@@ -38,15 +38,18 @@ pub fn sun_state(time: DateTime<Utc>, latitude: f64, longitude: f64) -> SunState
     let refraction = RefractionCorrection::new(PRESSURE_MBAR, TEMPERATURE_C)
         .expect("standard pressure and temperature are in range");
 
-    let position = spa::solar_position(
-        time,
-        latitude,
-        longitude,
-        OBSERVER_ELEVATION_M,
-        DELTA_T_SECONDS,
-        Some(refraction),
-    )
-    .expect("site coordinates are validated at settings load");
+    let position = SolarPositions::new()
+        .at(
+            &time,
+            Location {
+                latitude,
+                longitude,
+            },
+            OBSERVER_ELEVATION_M,
+            DELTA_T_SECONDS,
+            Some(refraction),
+        )
+        .expect("site coordinates are validated at settings load");
 
     let apparent_zenith = position.zenith_angle();