diff --git a/8.10/buster/Dockerfile b/8.10/buster/Dockerfile
index a2d077d..a23f0a2 100644
--- a/8.10/buster/Dockerfile
+++ b/8.10/buster/Dockerfile
@@ -9,7 +9,7 @@ RUN apt-get update && \
         libtinfo-dev && \
     rm -rf /var/lib/apt/lists/*
 
-ARG STACK=2.7.5
+ARG STACK=2.9.1
 ARG STACK_RELEASE_KEY=C5705533DA4F78D8664B5DC0575159689BEFB442
 
 RUN set -eux; \
@@ -26,7 +26,7 @@ RUN set -eux; \
             INSTALL_STACK="false"; \
             ;; \
         'x86_64') \
-            STACK_SHA256='9bcd165358d4dcafd2b33320d4fe98ce72faaf62300cc9b0fb86a27eb670da50'; \
+            STACK_SHA256='0581cebe880b8ed47556ee73d8bbb9d602b5b82e38f89f6aa53acaec37e7760d'; \
             ;; \
         *) echo >&2 "error: unsupported architecture '$ARCH'" ; exit 1 ;; \
     esac; \
diff --git a/8.10/slim-buster/Dockerfile b/8.10/slim-buster/Dockerfile
index 09dc783..e062877 100644
--- a/8.10/slim-buster/Dockerfile
+++ b/8.10/slim-buster/Dockerfile
@@ -23,7 +23,7 @@ RUN apt-get update && \
         zlib1g-dev && \
     rm -rf /var/lib/apt/lists/*
 
-ARG STACK=2.7.5
+ARG STACK=2.9.1
 ARG STACK_RELEASE_KEY=C5705533DA4F78D8664B5DC0575159689BEFB442
 
 RUN set -eux; \
@@ -40,7 +40,7 @@ RUN set -eux; \
             INSTALL_STACK="false"; \
             ;; \
         'x86_64') \
-            STACK_SHA256='9bcd165358d4dcafd2b33320d4fe98ce72faaf62300cc9b0fb86a27eb670da50'; \
+            STACK_SHA256='0581cebe880b8ed47556ee73d8bbb9d602b5b82e38f89f6aa53acaec37e7760d'; \
             ;; \
         *) echo >&2 "error: unsupported architecture '$ARCH'" ; exit 1 ;; \
     esac; \
diff --git a/9.0/buster/Dockerfile b/9.0/buster/Dockerfile
index 4e98ed1..e628277 100644
--- a/9.0/buster/Dockerfile
+++ b/9.0/buster/Dockerfile
@@ -9,7 +9,7 @@ RUN apt-get update && \
         libtinfo-dev && \
     rm -rf /var/lib/apt/lists/*
 
-ARG STACK=2.7.5
+ARG STACK=2.9.1
 ARG STACK_RELEASE_KEY=C5705533DA4F78D8664B5DC0575159689BEFB442
 
 RUN set -eux; \
@@ -26,7 +26,7 @@ RUN set -eux; \
             INSTALL_STACK="false"; \
             ;; \
         'x86_64') \
-            STACK_SHA256='9bcd165358d4dcafd2b33320d4fe98ce72faaf62300cc9b0fb86a27eb670da50'; \
+            STACK_SHA256='0581cebe880b8ed47556ee73d8bbb9d602b5b82e38f89f6aa53acaec37e7760d'; \
             ;; \
         *) echo >&2 "error: unsupported architecture '$ARCH'" ; exit 1 ;; \
     esac; \
diff --git a/9.0/slim-buster/Dockerfile b/9.0/slim-buster/Dockerfile
index 3074c5e..d5840fd 100644
--- a/9.0/slim-buster/Dockerfile
+++ b/9.0/slim-buster/Dockerfile
@@ -23,7 +23,7 @@ RUN apt-get update && \
         zlib1g-dev && \
     rm -rf /var/lib/apt/lists/*
 
-ARG STACK=2.7.5
+ARG STACK=2.9.1
 ARG STACK_RELEASE_KEY=C5705533DA4F78D8664B5DC0575159689BEFB442
 
 RUN set -eux; \
@@ -40,7 +40,7 @@ RUN set -eux; \
             INSTALL_STACK="false"; \
             ;; \
         'x86_64') \
-            STACK_SHA256='9bcd165358d4dcafd2b33320d4fe98ce72faaf62300cc9b0fb86a27eb670da50'; \
+            STACK_SHA256='0581cebe880b8ed47556ee73d8bbb9d602b5b82e38f89f6aa53acaec37e7760d'; \
             ;; \
         *) echo >&2 "error: unsupported architecture '$ARCH'" ; exit 1 ;; \
     esac; \
diff --git a/9.2/buster/Dockerfile b/9.2/buster/Dockerfile
index 25d6b94..60246f2 100644
--- a/9.2/buster/Dockerfile
+++ b/9.2/buster/Dockerfile
@@ -9,7 +9,7 @@ RUN apt-get update && \
         libtinfo-dev && \
     rm -rf /var/lib/apt/lists/*
 
-ARG STACK=2.7.5
+ARG STACK=2.9.1
 ARG STACK_RELEASE_KEY=C5705533DA4F78D8664B5DC0575159689BEFB442
 
 RUN set -eux; \
@@ -26,7 +26,7 @@ RUN set -eux; \
             INSTALL_STACK="false"; \
             ;; \
         'x86_64') \
-            STACK_SHA256='9bcd165358d4dcafd2b33320d4fe98ce72faaf62300cc9b0fb86a27eb670da50'; \
+            STACK_SHA256='0581cebe880b8ed47556ee73d8bbb9d602b5b82e38f89f6aa53acaec37e7760d'; \
             ;; \
         *) echo >&2 "error: unsupported architecture '$ARCH'" ; exit 1 ;; \
     esac; \
diff --git a/9.2/slim-buster/Dockerfile b/9.2/slim-buster/Dockerfile
index 0f24832..0dc6210 100644
--- a/9.2/slim-buster/Dockerfile
+++ b/9.2/slim-buster/Dockerfile
@@ -23,7 +23,7 @@ RUN apt-get update && \
         zlib1g-dev && \
     rm -rf /var/lib/apt/lists/*
 
-ARG STACK=2.7.5
+ARG STACK=2.9.1
 ARG STACK_RELEASE_KEY=C5705533DA4F78D8664B5DC0575159689BEFB442
 
 RUN set -eux; \
@@ -40,7 +40,7 @@ RUN set -eux; \
             INSTALL_STACK="false"; \
             ;; \
         'x86_64') \
-            STACK_SHA256='9bcd165358d4dcafd2b33320d4fe98ce72faaf62300cc9b0fb86a27eb670da50'; \
+            STACK_SHA256='0581cebe880b8ed47556ee73d8bbb9d602b5b82e38f89f6aa53acaec37e7760d'; \
             ;; \
         *) echo >&2 "error: unsupported architecture '$ARCH'" ; exit 1 ;; \
     esac; \
diff --git a/9.4/buster/Dockerfile b/9.4/buster/Dockerfile
index 3b2922a..c9da3bc 100644
--- a/9.4/buster/Dockerfile
+++ b/9.4/buster/Dockerfile
@@ -9,7 +9,7 @@ RUN apt-get update && \
         libtinfo-dev && \
     rm -rf /var/lib/apt/lists/*
 
-ARG STACK=2.7.5
+ARG STACK=2.9.1
 ARG STACK_RELEASE_KEY=C5705533DA4F78D8664B5DC0575159689BEFB442
 
 RUN set -eux; \
@@ -26,7 +26,7 @@ RUN set -eux; \
             INSTALL_STACK="false"; \
             ;; \
         'x86_64') \
-            STACK_SHA256='9bcd165358d4dcafd2b33320d4fe98ce72faaf62300cc9b0fb86a27eb670da50'; \
+            STACK_SHA256='0581cebe880b8ed47556ee73d8bbb9d602b5b82e38f89f6aa53acaec37e7760d'; \
             ;; \
         *) echo >&2 "error: unsupported architecture '$ARCH'" ; exit 1 ;; \
     esac; \
diff --git a/9.4/slim-buster/Dockerfile b/9.4/slim-buster/Dockerfile
index d95d4ab..be06789 100644
--- a/9.4/slim-buster/Dockerfile
+++ b/9.4/slim-buster/Dockerfile
@@ -23,7 +23,7 @@ RUN apt-get update && \
         zlib1g-dev && \
     rm -rf /var/lib/apt/lists/*
 
-ARG STACK=2.7.5
+ARG STACK=2.9.1
 ARG STACK_RELEASE_KEY=C5705533DA4F78D8664B5DC0575159689BEFB442
 
 RUN set -eux; \
@@ -40,7 +40,7 @@ RUN set -eux; \
             INSTALL_STACK="false"; \
             ;; \
         'x86_64') \
-            STACK_SHA256='9bcd165358d4dcafd2b33320d4fe98ce72faaf62300cc9b0fb86a27eb670da50'; \
+            STACK_SHA256='0581cebe880b8ed47556ee73d8bbb9d602b5b82e38f89f6aa53acaec37e7760d'; \
             ;; \
         *) echo >&2 "error: unsupported architecture '$ARCH'" ; exit 1 ;; \
     esac; \