diff --git a/untested_base/Dockerfile_dev.in b/untested_base/Dockerfile_dev.in
index 5827135..c9eba95 100644
--- a/untested_base/Dockerfile_dev.in
+++ b/untested_base/Dockerfile_dev.in
@@ -53,8 +53,8 @@ RUN \
         liblz4-dev \
         libsnappy-dev \
         libzopfli-dev \
-        llvm-14 \
-        llvm-14-dev \
+        llvm-15 \
+        llvm-15-dev \
         sqlite3 \
         curl \
         ca-certificates \
@@ -124,7 +124,7 @@ RUN printf '[libs]\nsystem_freetype = True\n' > /tmp/mpl_setup.cfg
 ENV MPLSETUPCFG /tmp/mpl_setup.cfg
 
 # Special-Case packages that have a specific build order and/or special parameters
-ENV LLVM_CONFIG llvm-config-14
+ENV LLVM_CONFIG llvm-config-15
 RUN \
     export NPY_NUM_BUILD_JOBS=$(nproc) && \
     export PIP_USE_PEP517=1 && \
diff --git a/untested_base/Dockerfile_empty.in b/untested_base/Dockerfile_empty.in
index 33b6c7a..6e12aa1 100644
--- a/untested_base/Dockerfile_empty.in
+++ b/untested_base/Dockerfile_empty.in
@@ -38,7 +38,7 @@ RUN \
         libsnappy1v5 \
         libzopfli1 \
         libxcb1 \
-        libllvm14 \
+        libllvm15 \
         libgomp1 \
         sqlite3 \
         curl \