diff --git a/Dockerfile b/Dockerfile
index f43c18d1f0055f12a6017fa0a8ff2da30e55c9ca..dc4a3069022351a8e8e1d82aafbe340964297d62 100755
--- a/Dockerfile
+++ b/Dockerfile
@@ -28,7 +28,7 @@ RUN \
 ARG RSYNC_REMOTE
 
 # Build PROJ
-ARG PROJ_VERSION=7.2.1
+ARG PROJ_VERSION=8.1.0
 ARG PROJ_FILENAME=proj-${PROJ_VERSION}.tar.gz 
 COPY ./${PROJ_FILENAME} /tmp
 
diff --git a/hardening_manifest.yaml b/hardening_manifest.yaml
index 97bc4f0f4f0ba4d66d9a15634602884dcd9ce3b3..a5bc036ef0d25b6029bd60664a289ab5521c6ff2 100755
--- a/hardening_manifest.yaml
+++ b/hardening_manifest.yaml
@@ -21,11 +21,11 @@ resources:
     validation:
       type: "sha256"
       value: "6c3c2422d129a9fef030d6aaa5bd3dd45ee798808953099313ffd36ab2945055"
-  - url: https://github.com/OSGeo/PROJ/archive/7.2.1.tar.gz
-    filename: proj-7.2.1.tar.gz
+  - url: https://github.com/OSGeo/PROJ/archive/8.1.0.tar.gz
+    filename: proj-8.1.0.tar.gz
     validation:
       type: "sha256"
-      value: "29bd55d786d8798cec309b5ff9f1c093f6fbe3fcfa16669796f3433c80cfa45d"
+      value: "401900838169feea1e794aa14747e98ce5a562fad19811363e1b326069b270c6"
   - url: http://download.osgeo.org/proj/proj-datumgrid-1.8.zip
     filename: proj-datumgrid-1.8.zip
     validation: