diff --git a/.github/workflows/linux-ci.yml b/.github/workflows/linux-ci.yml
index 44cff247fc..c56dc3e600 100644
--- a/.github/workflows/linux-ci.yml
+++ b/.github/workflows/linux-ci.yml
@@ -71,8 +71,8 @@ jobs:
           case ${{matrix.strictness}} in
             normal) ;;
             strict) case ${{matrix.compiler}} in
-                      (gcc) HB_USER_CFLAGS="$HB_USER_CFLAGS -Werror -Wno-error=array-bounds" ;;
-                      (*)   HB_USER_CFLAGS="$HB_USER_CFLAGS -Werror" ;;
+                      (gcc) HB_USER_CFLAGS="$HB_USER_CFLAGS -Werror -Wno-error=deprecated-declarations -Wno-error=array-bounds" ;;
+                      (*)   HB_USER_CFLAGS="$HB_USER_CFLAGS -Werror -Wno-error=deprecated-declarations" ;;
                     esac ;;
           esac
           tee ./.bashrc <<EOENV
diff --git a/.github/workflows/macos-ci.yml b/.github/workflows/macos-ci.yml
index fc6cd889bd..1cc0a5a53f 100644
--- a/.github/workflows/macos-ci.yml
+++ b/.github/workflows/macos-ci.yml
@@ -61,8 +61,8 @@ jobs:
           case ${{matrix.strictness}} in
             normal) ;;
             strict) case ${{matrix.compiler}} in
-                      (gcc) HB_USER_CFLAGS="$HB_USER_CFLAGS -Werror -Wno-error=array-bounds" ;;
-                      (*)   HB_USER_CFLAGS="$HB_USER_CFLAGS -Werror" ;;
+                      (gcc) HB_USER_CFLAGS="$HB_USER_CFLAGS -Werror -Wno-error=deprecated-declarations -Wno-error=array-bounds" ;;
+                      (*)   HB_USER_CFLAGS="$HB_USER_CFLAGS -Werror -Wno-error=deprecated-declarations" ;;
                     esac ;;
           esac
           tee ./.bashrc <<EOENV
diff --git a/.github/workflows/vm1-ci.yml b/.github/workflows/vm1-ci.yml
index 1e11ab6ca2..f64e00bab5 100644
--- a/.github/workflows/vm1-ci.yml
+++ b/.github/workflows/vm1-ci.yml
@@ -104,7 +104,7 @@ jobs:
           case ${{matrix.strictness}} in
             normal) ;;
             strict) case ${{matrix.compiler}} in
-                      (gcc) HB_USER_CFLAGS="$HB_USER_CFLAGS -Werror -Wno-error=array-bounds" ;;
+                      (gcc) HB_USER_CFLAGS="$HB_USER_CFLAGS -Werror -Wno-error=deprecated-declarations -Wno-error=array-bounds" ;;
                       (*)   HB_USER_CFLAGS="$HB_USER_CFLAGS -Werror" ;;
                     esac ;;
           esac
diff --git a/.github/workflows/windows-ci.yml b/.github/workflows/windows-ci.yml
index ddfe220069..231d0d4496 100644
--- a/.github/workflows/windows-ci.yml
+++ b/.github/workflows/windows-ci.yml
@@ -69,7 +69,10 @@ jobs:
           ref: ${{ github.event.client_payload.branch }}
 
       - run: pwd
+        shell: msys2 {0}
+
       - run: ls
+        shell: msys2 {0}
 
       - name: Prepare ccache using action
         if: matrix.compiler != 'bcc'
@@ -87,9 +90,9 @@ jobs:
           case ${{matrix.strictness}} in
             normal) ;;
             strict) case ${{matrix.compiler}} in
-                      (mingw64) HB_USER_CFLAGS="$HB_USER_CFLAGS -Werror -Wno-error=array-bounds" ;;
+                      (mingw64) HB_USER_CFLAGS="$HB_USER_CFLAGS -Werror -Wno-error=deprecated-declarations -Wno-error=array-bounds" ;;
                       (bcc) HB_USER_CFLAGS="$HB_USER_CFLAGS -w!" ;;
-                      (*)   HB_USER_CFLAGS="$HB_USER_CFLAGS -Werror" ;;
+                      (*)   HB_USER_CFLAGS="$HB_USER_CFLAGS -Werror -Wno-error=deprecated-declarations" ;;
                     esac ;;
           esac
           tee ./.bashrc <<EOENV
@@ -114,6 +117,15 @@ jobs:
           export HB_CCACHE=""
           EOMSYSENV
               ;;
+            *)
+              tee -a ./.bashrc <<'EOCCACHE'
+          # Reconfigure ccache in msys2
+          ccache --set-config="cache_dir=$(pwd)/.ccache"
+          ccache --set-config=max_size=32M
+          ccache --set-config=compression=true
+          ccache -p
+          EOCCACHE
+              ;;
           esac
 
 
diff --git a/ChangeLog.txt b/ChangeLog.txt
index ea38f8d36e..8c05e0a70e 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -7,6 +7,15 @@
    Entries may not always be in chronological/commit order.
    See license at the end of file. */
 
+2023-11-12 14:38 UTC+0100 Phil Krylov (phil a t krylov.eu)
+  * .github/workflows/linux-ci.yml
+  * .github/workflows/macos-ci.yml
+  * .github/workflows/vm1-ci.yml
+  * .github/workflows/windows-ci.yml
+    * Made strict CI build not that strict by adding
+      -Wno-error=deprecated-declarations.
+    ! Fixed ccache configuration under msys2.
+
 2023-11-11 21:41 UTC+0100 Phil Krylov (phil a t krylov.eu)
   * contrib/hbwin/win_bmp.c
     ! Fixed dangling pointer access (introduced in commit 64dba82) in