diff --git a/DESCRIPTION b/DESCRIPTION
index 3e7d035..af92d2d 100755
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -39,28 +39,28 @@ URL: https://github.com/special-uor/smpds/,
      https://research.reading.ac.uk/palaeoclimate/
 BugReports: https://github.com/special-uor/smpds/issues/
 Imports: 
-    dplyr,
-    elevatr,
-    fields,
-    furrr,
-    future,
-    ggplot2,
-    lubridate,
-    magrittr,
-    ncdf4,
-    progressr,
-    purrr,
-    raster,
-    Rdpack (>= 0.8),
-    readr,
-    rnaturalearth,
-    sf,
-    sp,
-    spgwr,
-    splash,
-    stringr,
-    tibble,
-    tidyr
+    dplyr (>= 1.1.4),
+    elevatr (>= 0.99.0),
+    fields (>= 16.2),
+    furrr (>= 0.3.1),
+    future (>= 1.33.2),
+    ggplot2 (>= 3.5.1),
+    lubridate (>= 1.9.3),
+    magrittr (>= 2.0.3),
+    ncdf4 (>= 1.22),
+    progressr (>= 0.14.0),
+    purrr (>= 1.0.2),
+    raster (>= 3.6-26),
+    Rdpack (>= 2.6),
+    readr (>= 2.1.5),
+    rnaturalearth (>= 1.0.1),
+    sf (>= 1.0-16),
+    sp (>= 2.1-4),
+    spgwr (>= 0.6-37),
+    splash (>= 1.0.2),
+    stringr (>= 1.5.1),
+    tibble (>= 3.2.1),
+    tidyr (>= 1.3.1)
 Depends: 
     R (>= 2.10)
 RdMacros: Rdpack