diff --git a/ChangeLog.md b/ChangeLog.md
index 48180d94cc..bad538db6e 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -37,6 +37,8 @@ Bug fixes:
 * Fix an inconsistency in the pretty formatting of the output of
   `stack build --coverage`
 * Fix repeated warning about missing parameters when using `stack new`
+* Include `pantry-0.5.6`: Remove operational and mirror keys from bootstrap key
+  set [#53](https://github.com/commercialhaskell/pantry/pull/53)
 
 ## v2.7.5
 
diff --git a/package.yaml b/package.yaml
index 2fe604bf28..c772bdd680 100644
--- a/package.yaml
+++ b/package.yaml
@@ -92,7 +92,7 @@ dependencies:
 - network-uri
 - open-browser
 - optparse-applicative >= 0.14.3.0
-- pantry >= 0.5.3
+- pantry >= 0.5.6
 - casa-client
 - casa-types
 - path
diff --git a/stack-ghc-902.yaml b/stack-ghc-902.yaml
index f9fe4a1d66..6928869675 100644
--- a/stack-ghc-902.yaml
+++ b/stack-ghc-902.yaml
@@ -26,6 +26,7 @@ extra-deps:
 - mustache-2.4.1@sha256:dc92ddbf90e3a64c3f2ec7785cf2937d6dcf6ffcebbc38ad9c8b33b6a70bb298,3180
 # lts-19.11 is limited to hpack-0.34.7
 - hpack-0.35.0@sha256:8cd6146fae269390f41dc7237ebd2c479074d4163806d349a41f5a7751d6cea5,4726
+- pantry-0.5.6@rev:0 # https://github.com/commercialhaskell/pantry/pull/53
 
 drop-packages:
 # See https://github.com/commercialhaskell/stack/pull/4712
diff --git a/stack-ghc-922.yaml b/stack-ghc-922.yaml
index 4bd270e7d9..11430f72e5 100644
--- a/stack-ghc-922.yaml
+++ b/stack-ghc-922.yaml
@@ -21,7 +21,8 @@ flags:
 ghc-options:
    "$locals": -fhide-source-paths
 
-extra-deps: []
+extra-deps:
+- pantry-0.5.6@rev:0 # https://github.com/commercialhaskell/pantry/pull/53
 
 drop-packages:
 # See https://github.com/commercialhaskell/stack/pull/4712
diff --git a/stack.cabal b/stack.cabal
index 5bb8c398ed..8ab716a14d 100644
--- a/stack.cabal
+++ b/stack.cabal
@@ -1,6 +1,6 @@
 cabal-version: 2.0
 
--- This file has been generated from package.yaml by hpack version 0.35.0.
+-- This file has been generated from package.yaml by hpack version 0.34.4.
 --
 -- see: https://github.com/sol/hpack
 
@@ -271,7 +271,7 @@ library
     , network-uri
     , open-browser
     , optparse-applicative >=0.14.3.0
-    , pantry >=0.5.3
+    , pantry >=0.5.6
     , path
     , path-io
     , persistent
@@ -306,7 +306,6 @@ library
     , yaml
     , zip-archive
     , zlib
-  default-language: Haskell2010
   if os(windows)
     cpp-options: -DWINDOWS
     build-depends:
@@ -332,6 +331,7 @@ library
         src/unix/
     c-sources:
         src/unix/cbits/uname.c
+  default-language: Haskell2010
 
 executable stack
   main-is: Main.hs
@@ -394,7 +394,7 @@ executable stack
     , network-uri
     , open-browser
     , optparse-applicative >=0.14.3.0
-    , pantry >=0.5.3
+    , pantry >=0.5.6
     , path
     , path-io
     , persistent
@@ -430,7 +430,6 @@ executable stack
     , yaml
     , zip-archive
     , zlib
-  default-language: Haskell2010
   if os(windows)
     cpp-options: -DWINDOWS
     build-depends:
@@ -455,14 +454,13 @@ executable stack
     cpp-options: -DHIDE_DEP_VERSIONS
   if flag(supported-build)
     cpp-options: -DSUPPORTED_BUILD
+  default-language: Haskell2010
 
 executable stack-integration-test
   main-is: IntegrationSpec.hs
   other-modules:
       StackTest
       Paths_stack
-  autogen-modules:
-      Paths_stack
   hs-source-dirs:
       test/integration
       test/integration/lib
@@ -518,7 +516,7 @@ executable stack-integration-test
     , open-browser
     , optparse-applicative >=0.14.3.0
     , optparse-generic
-    , pantry >=0.5.3
+    , pantry >=0.5.6
     , path
     , path-io
     , persistent
@@ -553,7 +551,6 @@ executable stack-integration-test
     , yaml
     , zip-archive
     , zlib
-  default-language: Haskell2010
   if os(windows)
     cpp-options: -DWINDOWS
     build-depends:
@@ -571,6 +568,7 @@ executable stack-integration-test
     buildable: False
   if flag(static)
     ld-options: -static -pthread
+  default-language: Haskell2010
 
 test-suite stack-test
   type: exitcode-stdio-1.0
@@ -591,8 +589,6 @@ test-suite stack-test
       Stack.Types.TemplateNameSpec
       Stack.UploadSpec
       Paths_stack
-  autogen-modules:
-      Paths_stack
   hs-source-dirs:
       src/test
   ghc-options: -Wall -fwarn-tabs -fwarn-incomplete-uni-patterns -fwarn-incomplete-record-updates -optP-Wno-nonportable-include-path -threaded
@@ -647,7 +643,7 @@ test-suite stack-test
     , network-uri
     , open-browser
     , optparse-applicative >=0.14.3.0
-    , pantry >=0.5.3
+    , pantry >=0.5.6
     , path
     , path-io
     , persistent
@@ -685,7 +681,6 @@ test-suite stack-test
     , yaml
     , zip-archive
     , zlib
-  default-language: Haskell2010
   if os(windows)
     cpp-options: -DWINDOWS
     build-depends:
@@ -699,5 +694,6 @@ test-suite stack-test
     cpp-options: -DSTACK_DEVELOPER_MODE_DEFAULT=True
   else
     cpp-options: -DSTACK_DEVELOPER_MODE_DEFAULT=False
+  default-language: Haskell2010
   build-tool-depends:
       hspec-discover:hspec-discover
diff --git a/stack.yaml b/stack.yaml
index 1bf4b0db4c..954949e5ac 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -5,7 +5,7 @@ packages:
 
 extra-deps:
 - hpack-0.35.0@rev:0
-- pantry-0.5.3@rev:0
+- pantry-0.5.6@rev:0 # https://github.com/commercialhaskell/pantry/pull/53
 - rio-0.1.21.0@rev:0