diff --git a/php-unit-test/8.0/Dockerfile b/php-unit-test/8.0/Dockerfile
index f5721ebf9d94a7feff19ddc20bd94d762e0ce33f..52c9e491a0288b15e04061ebbbdbe86f0ab9731c 100644
--- a/php-unit-test/8.0/Dockerfile
+++ b/php-unit-test/8.0/Dockerfile
@@ -13,7 +13,7 @@ LABEL org.label-schema.build-date=$BUILD_DATE \
       maintainer="Alan Nelson <alan.nelson@nebraska.edu>"
 
 RUN export BUILD_DEPS="bzip2-dev icu-dev libpng-dev libzip-dev openldap-dev" \
-    && apk add --no-cache bash nodejs nodejs-npm $PHPIZE_DEPS $BUILD_DEPS \
+    && apk add --no-cache bash nodejs nodejs-npm linux-headers $PHPIZE_DEPS $BUILD_DEPS \
     && pecl channel-update pecl.php.net \
     && pecl install xdebug redis \
     && docker-php-ext-install bz2 gd intl ldap mysqli pdo_mysql zip \
diff --git a/php-unit-test/8.1/Dockerfile b/php-unit-test/8.1/Dockerfile
index 77db17120d5079d7c84df1a70aaf4f3156c4184c..0eceb72a40cd437ee72501f2bcdd2650e4bb3b39 100644
--- a/php-unit-test/8.1/Dockerfile
+++ b/php-unit-test/8.1/Dockerfile
@@ -13,7 +13,7 @@ LABEL org.label-schema.build-date=$BUILD_DATE \
       maintainer="Alan Nelson <alan.nelson@nebraska.edu>"
 
 RUN export BUILD_DEPS="bzip2-dev icu-dev libpng-dev libzip-dev openldap-dev" \
-    && apk add --no-cache bash nodejs npm $PHPIZE_DEPS $BUILD_DEPS \
+    && apk add --no-cache bash nodejs npm linux-headers $PHPIZE_DEPS $BUILD_DEPS \
     && pecl channel-update pecl.php.net \
     && pecl install xdebug redis \
     && docker-php-ext-install bz2 gd intl ldap mysqli pdo_mysql zip \
diff --git a/php-unit-test/8.2/Dockerfile b/php-unit-test/8.2/Dockerfile
index fa6012dd7e6395160d21a7f4681bfec12bcdf841..a4dd31fb745aa92249b609f107cf9c9f4afad86e 100644
--- a/php-unit-test/8.2/Dockerfile
+++ b/php-unit-test/8.2/Dockerfile
@@ -13,7 +13,7 @@ LABEL org.label-schema.build-date=$BUILD_DATE \
       maintainer="Alan Nelson <alan.nelson@nebraska.edu>"
 
 RUN export BUILD_DEPS="bzip2-dev icu-dev libpng-dev libzip-dev openldap-dev" \
-    && apk add --no-cache bash nodejs npm $PHPIZE_DEPS $BUILD_DEPS \
+    && apk add --no-cache bash nodejs npm linux-headers $PHPIZE_DEPS $BUILD_DEPS \
     && pecl channel-update pecl.php.net \
     && pecl install xdebug redis \
     && docker-php-ext-install bz2 gd intl ldap mysqli pdo_mysql zip \