diff --git a/Pipfile b/Pipfile
index 49a6d5a4..22990951 100644
--- a/Pipfile
+++ b/Pipfile
@@ -8,7 +8,7 @@ affine = "==2.3.0"
 numpy = "==1.22.0"
 pydantic = "==2.4.2"
 python-dotenv = "==0.19.2"
-scipy = "==1.10.0"
+scipy = ">=1.11.4"
 requests = "==2.31.0"
 s3fs = "==2022.1.0"
 zarr = "==2.10.3"
diff --git a/Pipfile.lock b/Pipfile.lock
index bad7f18d..ece76b2b 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "52d4fa1b9bced925d814fab02e4e1c93e16457b184b66e142334240288cb5ec3"
+            "sha256": "e8e9349731e1d03c057510558c51e0700c0359fb114865bf3ff6f48a6ee447cd"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -444,7 +444,7 @@
                 "sha256:b85d0567b8666149a93172712e68920734333c0ce7e89b78b3e987f71e5ed4f9",
                 "sha256:cdf6525904cc597730141d61b36f2e4b8ecc257c420fa2f4549bac2c2d0cb72f"
             ],
-            "markers": "python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2'",
+            "markers": "python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==0.10.0"
         },
         "llvmlite": {
@@ -848,7 +848,7 @@
                 "sha256:0123cacc1627ae19ddf3c27a5de5bd67ee4586fbdd6440d9748f8abb483d3e86",
                 "sha256:961d03dc3453ebbc59dbdea9e4e11c5651520a876d0f4db161e8674aae935da9"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2'",
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==2.8.2"
         },
         "python-dotenv": {
@@ -880,31 +880,35 @@
         },
         "scipy": {
             "hashes": [
-                "sha256:0490dc499fe23e4be35b8b6dd1e60a4a34f0c4adb30ac671e6332446b3cbbb5a",
-                "sha256:0ab2a58064836632e2cec31ca197d3695c86b066bc4818052b3f5381bfd2a728",
-                "sha256:151f066fe7d6653c3ffefd489497b8fa66d7316e3e0d0c0f7ff6acca1b802809",
-                "sha256:16ba05d3d1b9f2141004f3f36888e05894a525960b07f4c2bfc0456b955a00be",
-                "sha256:27e548276b5a88b51212b61f6dda49a24acf5d770dff940bd372b3f7ced8c6c2",
-                "sha256:2ad449db4e0820e4b42baccefc98ec772ad7818dcbc9e28b85aa05a536b0f1a2",
-                "sha256:2f9ea0a37aca111a407cb98aa4e8dfde6e5d9333bae06dfa5d938d14c80bb5c3",
-                "sha256:38bfbd18dcc69eeb589811e77fae552fa923067fdfbb2e171c9eac749885f210",
-                "sha256:3afcbddb4488ac950ce1147e7580178b333a29cd43524c689b2e3543a080a2c8",
-                "sha256:42ab8b9e7dc1ebe248e55f54eea5307b6ab15011a7883367af48dd781d1312e4",
-                "sha256:441cab2166607c82e6d7a8683779cb89ba0f475b983c7e4ab88f3668e268c143",
-                "sha256:4bd0e3278126bc882d10414436e58fa3f1eca0aa88b534fcbf80ed47e854f46c",
-                "sha256:4df25a28bd22c990b22129d3c637fd5c3be4b7c94f975dca909d8bab3309b694",
-                "sha256:5cd7a30970c29d9768a7164f564d1fbf2842bfc77b7d114a99bc32703ce0bf48",
-                "sha256:6e4497e5142f325a5423ff5fda2fff5b5d953da028637ff7c704378c8c284ea7",
-                "sha256:6faf86ef7717891195ae0537e48da7524d30bc3b828b30c9b115d04ea42f076f",
-                "sha256:954ff69d2d1bf666b794c1d7216e0a746c9d9289096a64ab3355a17c7c59db54",
-                "sha256:9b878c671655864af59c108c20e4da1e796154bd78c0ed6bb02bc41c84625686",
-                "sha256:b901b423c91281a974f6cd1c36f5c6c523e665b5a6d5e80fcb2334e14670eefd",
-                "sha256:c8b3cbc636a87a89b770c6afc999baa6bcbb01691b5ccbbc1b1791c7c0a07540",
-                "sha256:e096b062d2efdea57f972d232358cb068413dc54eec4f24158bcbb5cb8bddfd8"
+                "sha256:00150c5eae7b610c32589dda259eacc7c4f1665aedf25d921907f4d08a951b1c",
+                "sha256:028eccd22e654b3ea01ee63705681ee79933652b2d8f873e7949898dda6d11b6",
+                "sha256:1b7c3dca977f30a739e0409fb001056484661cb2541a01aba0bb0029f7b68db8",
+                "sha256:2c6ff6ef9cc27f9b3db93a6f8b38f97387e6e0591600369a297a50a8e96e835d",
+                "sha256:36750b7733d960d7994888f0d148d31ea3017ac15eef664194b4ef68d36a4a97",
+                "sha256:530f9ad26440e85766509dbf78edcfe13ffd0ab7fec2560ee5c36ff74d6269ff",
+                "sha256:5e347b14fe01003d3b78e196e84bd3f48ffe4c8a7b8a1afbcb8f5505cb710993",
+                "sha256:6550466fbeec7453d7465e74d4f4b19f905642c89a7525571ee91dd7adabb5a3",
+                "sha256:6df1468153a31cf55ed5ed39647279beb9cfb5d3f84369453b49e4b8502394fd",
+                "sha256:6e619aba2df228a9b34718efb023966da781e89dd3d21637b27f2e54db0410d7",
+                "sha256:8fce70f39076a5aa62e92e69a7f62349f9574d8405c0a5de6ed3ef72de07f446",
+                "sha256:90a2b78e7f5733b9de748f589f09225013685f9b218275257f8a8168ededaeaa",
+                "sha256:91af76a68eeae0064887a48e25c4e616fa519fa0d38602eda7e0f97d65d57937",
+                "sha256:933baf588daa8dc9a92c20a0be32f56d43faf3d1a60ab11b3f08c356430f6e56",
+                "sha256:acf8ed278cc03f5aff035e69cb511741e0418681d25fbbb86ca65429c4f4d9cd",
+                "sha256:ad669df80528aeca5f557712102538f4f37e503f0c5b9541655016dd0932ca79",
+                "sha256:b030c6674b9230d37c5c60ab456e2cf12f6784596d15ce8da9365e70896effc4",
+                "sha256:b9999c008ccf00e8fbcce1236f85ade5c569d13144f77a1946bef8863e8f6eb4",
+                "sha256:bc9a714581f561af0848e6b69947fda0614915f072dfd14142ed1bfe1b806710",
+                "sha256:ce7fff2e23ab2cc81ff452a9444c215c28e6305f396b2ba88343a567feec9660",
+                "sha256:cf00bd2b1b0211888d4dc75656c0412213a8b25e80d73898083f402b50f47e41",
+                "sha256:d10e45a6c50211fe256da61a11c34927c68f277e03138777bdebedd933712fea",
+                "sha256:ee410e6de8f88fd5cf6eadd73c135020bfbbbdfcd0f6162c36a7638a1ea8cc65",
+                "sha256:f313b39a7e94f296025e3cffc2c567618174c0b1dde173960cf23808f9fae4be",
+                "sha256:f3cd9e7b3c2c1ec26364856f9fbe78695fe631150f94cd1c22228456404cf1ec"
             ],
             "index": "pypi",
-            "markers": "python_version < '3.12' and python_version >= '3.8'",
-            "version": "==1.10.0"
+            "markers": "python_version >= '3.9'",
+            "version": "==1.11.4"
         },
         "setuptools": {
             "hashes": [
@@ -919,7 +923,7 @@
                 "sha256:1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926",
                 "sha256:8abb2f1d86890a2dfb989f9a77cfcfd3e47c2a354b01111771326f8aa26e0254"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2'",
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==1.16.0"
         },
         "typing-extensions": {
@@ -1870,7 +1874,7 @@
                 "sha256:0123cacc1627ae19ddf3c27a5de5bd67ee4586fbdd6440d9748f8abb483d3e86",
                 "sha256:961d03dc3453ebbc59dbdea9e4e11c5651520a876d0f4db161e8674aae935da9"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2'",
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==2.8.2"
         },
         "pyyaml": {
@@ -2211,7 +2215,7 @@
                 "sha256:f481f16baec5290e45aebdc2a5168ebc6d35189ae6fea7a58787613a25f6e875",
                 "sha256:fff3573c2db359f091e1589c3d7c5fc2f86f5bdb6f24252c2d8e539d4e45f412"
             ],
-            "markers": "platform_python_implementation == 'CPython' and python_version < '3.13'",
+            "markers": "python_version < '3.13' and platform_python_implementation == 'CPython'",
             "version": "==0.2.8"
         },
         "setuptools": {
@@ -2227,7 +2231,7 @@
                 "sha256:1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926",
                 "sha256:8abb2f1d86890a2dfb989f9a77cfcfd3e47c2a354b01111771326f8aa26e0254"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2'",
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==1.16.0"
         },
         "snowballstemmer": {
diff --git a/pyproject.toml b/pyproject.toml
index 236f634a..a53994a7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "physrisk-lib"
-version = "0.19.0"
+version = "0.20.0"
 description = "Physical climate risk calculation engine."
 authors = [
     { name = "Joe Moorhouse", email = "72577720+MichaelTiemannOSC@users.noreply.github.com" },